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199980461 = 67244549
BaseRepresentation
bin10111110101101…
…11010110101101
3111221022001121202
423322313112231
5402143333321
631502135245
74645543262
oct1372672655
9457261552
10199980461
11a297a30a
1256b81525
133257b445
141c7b9269
151285370b
hexbeb75ad

199980461 has 6 divisors (see below), whose sum is σ = 203014350. Its totient is φ = 196991256.

The previous prime is 199980457. The next prime is 199980467. The reversal of 199980461 is 164089991.

It can be written as a sum of positive squares in only one way, i.e., 137475625 + 62504836 = 11725^2 + 7906^2 .

It is not a de Polignac number, because 199980461 - 22 = 199980457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199980467) 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 5 ways as a sum of consecutive naturals, for example, 17786 + ... + 26763.

It is an arithmetic number, because the mean of its divisors is an integer number (33835725).

Almost surely, 2199980461 is an apocalyptic number.

It is an amenable number.

199980461 is a deficient number, since it is larger than the sum of its proper divisors (3033889).

199980461 is an frugal number, since it uses more digits than its factorization.

199980461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44683 (or 44616 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 199980461 is about 14141.4447988881. Note that the first 3 decimals coincide. The cubic root of 199980461 is about 584.7845028948.

The spelling of 199980461 in words is "one hundred ninety-nine million, nine hundred eighty thousand, four hundred sixty-one".

Divisors: 1 67 4489 44549 2984783 199980461