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1961303413 = 1728976253
BaseRepresentation
bin111010011100111…
…0001110101110101
312001200112112111011
41310321301311311
513004043202123
6522341312221
766413542516
oct16471616565
95050475434
101961303413
11917117313
12468a05671
13253448b84
141486a4a0d
15b72bbe0d
hex74e71d75

1961303413 has 12 divisors (see below), whose sum is σ = 2106898020. Its totient is φ = 1825167872.

The previous prime is 1961303411. The next prime is 1961303453. The reversal of 1961303413 is 3143031691.

It can be written as a sum of positive squares in 6 ways, for example, as 762129 + 1960541284 = 873^2 + 44278^2 .

It is not a de Polignac number, because 1961303413 - 21 = 1961303411 is a prime.

It is a super-2 number, since 2×19613034132 = 7693422155690897138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961303411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12406 + ... + 63847.

It is an arithmetic number, because the mean of its divisors is an integer number (175574835).

Almost surely, 21961303413 is an apocalyptic number.

It is an amenable number.

1961303413 is a deficient number, since it is larger than the sum of its proper divisors (145594607).

1961303413 is an equidigital number, since it uses as much as digits as its factorization.

1961303413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76376 (or 76359 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 1961303413 is about 44286.6053451831. The cubic root of 1961303413 is about 1251.7422984951.

The spelling of 1961303413 in words is "one billion, nine hundred sixty-one million, three hundred three thousand, four hundred thirteen".

Divisors: 1 17 89 289 1513 25721 76253 1296301 6786517 22037117 115370789 1961303413