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1961981314 = 23726513261
BaseRepresentation
bin111010011110001…
…0111010110000010
312001201210222101121
41310330113112002
513004231400224
6522404022454
766422365066
oct16474272602
95051728347
101961981314
1191753a667
12469091a2a
132536255b7
141487ddaa6
15b73a2be4
hex74f17582

1961981314 has 8 divisors (see below), whose sum is σ = 3022511868. Its totient is φ = 954477360.

The previous prime is 1961981299. The next prime is 1961981317. The reversal of 1961981314 is 4131891691.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1955143089 + 6838225 = 44217^2 + 2615^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1961981317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13256557 + ... + 13256704.

Almost surely, 21961981314 is an apocalyptic number.

1961981314 is a deficient number, since it is larger than the sum of its proper divisors (1060530554).

1961981314 is a wasteful number, since it uses less digits than its factorization.

1961981314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26513300.

The product of its digits is 46656, while the sum is 43.

The square root of 1961981314 is about 44294.2582509291. The cubic root of 1961981314 is about 1251.8864984533.

The spelling of 1961981314 in words is "one billion, nine hundred sixty-one million, nine hundred eighty-one thousand, three hundred fourteen".

Divisors: 1 2 37 74 26513261 53026522 980990657 1961981314