56689257 has 8 divisors (see below), whose sum is σ = 75750784. Its totient is φ = 37710288.

The previous prime is 56689253. The next prime is 56689261. The reversal of 56689257 is 75298665.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56689253) and next prime (56689261).

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

It is not a de Polignac number, because 56689257 - 2² = 56689253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56689253) 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, 19018 + ... + 21795.

It is an arithmetic number, because the mean of its divisors is an integer number (9468848).

Almost surely, 2^56689257 is an apocalyptic number.

It is an amenable number.

56689257 is a deficient number, since it is larger than the sum of its proper divisors (19061527).

56689257 is a wasteful number, since it uses less digits than its factorization.

56689257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41279.

The product of its digits is 907200, while the sum is 48.

The square root of 56689257 is about 7529.2268527386. The cubic root of 56689257 is about 384.1494847151.

The spelling of 56689257 in words is "fifty-six million, six hundred eighty-nine thousand, two hundred fifty-seven".