513706761 has 12 divisors (see below), whose sum is σ = 742229488. Its totient is φ = 342374904.

The previous prime is 513706747. The next prime is 513706777. The reversal of 513706761 is 167607315.

513706761 is a `hidden beast` number, since 513 + 70 + 6 + 76 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-513706761 is a prime.

It is a super-2 number, since 2×513706761² = 527789272594222242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513706741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42546 + ... + 53268.

Almost surely, 2^513706761 is an apocalyptic number.

It is an amenable number.

513706761 is a deficient number, since it is larger than the sum of its proper divisors (228522727).

513706761 is a wasteful number, since it uses less digits than its factorization.

513706761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16052 (or 16049 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 513706761 is about 22665.1000659604. The cubic root of 513706761 is about 800.8879520826.

The spelling of 513706761 in words is "five hundred thirteen million, seven hundred six thousand, seven hundred sixty-one".