56992991 has 8 divisors (see below), whose sum is σ = 62650368. Its totient is φ = 51415000.

The previous prime is 56992981. The next prime is 56993009. The reversal of 56992991 is 19929965.

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

It is a cyclic number.

It is not a de Polignac number, because 56992991 - 2¹⁰ = 56991967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56992961) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18335 + ... + 21216.

It is an arithmetic number, because the mean of its divisors is an integer number (7831296).

Almost surely, 2^56992991 is an apocalyptic number.

56992991 is a deficient number, since it is larger than the sum of its proper divisors (5657377).

56992991 is a wasteful number, since it uses less digits than its factorization.

56992991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39693.

The product of its digits is 393660, while the sum is 50.

The square root of 56992991 is about 7549.3702386358. The cubic root of 56992991 is about 384.8343381276.

It can be divided in two parts, 5 and 6992991, that added together give a palindrome (6992996).

The spelling of 56992991 in words is "fifty-six million, nine hundred ninety-two thousand, nine hundred ninety-one".