56689997 has 8 divisors (see below), whose sum is σ = 69772416. Its totient is φ = 44853552.

The previous prime is 56689993. The next prime is 56689999. The reversal of 56689997 is 79998665.

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 56689997 - 2² = 56689993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56689993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 311393 + ... + 311574.

It is an arithmetic number, because the mean of its divisors is an integer number (8721552).

Almost surely, 2^56689997 is an apocalyptic number.

It is an amenable number.

56689997 is a deficient number, since it is larger than the sum of its proper divisors (13082419).

56689997 is a wasteful number, since it uses less digits than its factorization.

56689997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622987.

The product of its digits is 7348320, while the sum is 59.

The square root of 56689997 is about 7529.2759944101. The cubic root of 56689997 is about 384.1511562216.

The spelling of 56689997 in words is "fifty-six million, six hundred eighty-nine thousand, nine hundred ninety-seven".