56692981 has 4 divisors (see below), whose sum is σ = 56719264. Its totient is φ = 56666700.

The previous prime is 56692969. The next prime is 56692997. The reversal of 56692981 is 18929665.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56692981 - 2⁵ = 56692949 is a prime.

It is a super-2 number, since 2×56692981² = 6428188189332722, 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 (56692681) 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, 9585 + ... + 14326.

It is an arithmetic number, because the mean of its divisors is an integer number (14179816).

Almost surely, 2^56692981 is an apocalyptic number.

It is an amenable number.

56692981 is a deficient number, since it is larger than the sum of its proper divisors (26283).

56692981 is a wasteful number, since it uses less digits than its factorization.

56692981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26282.

The product of its digits is 233280, while the sum is 46.

The square root of 56692981 is about 7529.4741516257. The cubic root of 56692981 is about 384.1578963109.

The spelling of 56692981 in words is "fifty-six million, six hundred ninety-two thousand, nine hundred eighty-one".