56689919 has 16 divisors (see below), whose sum is σ = 67230240. Its totient is φ = 47122560.

The previous prime is 56689909. The next prime is 56689931. The reversal of 56689919 is 91998665.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56689919 is a prime.

It is a super-2 number, since 2×56689919² = 6427493832453122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56689909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13769 + ... + 17405.

It is an arithmetic number, because the mean of its divisors is an integer number (4201890).

Almost surely, 2^56689919 is an apocalyptic number.

56689919 is a deficient number, since it is larger than the sum of its proper divisors (10540321).

56689919 is a wasteful number, since it uses less digits than its factorization.

56689919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3770.

The product of its digits is 1049760, while the sum is 53.

The square root of 56689919 is about 7529.2708146274. The cubic root of 56689919 is about 384.1509800364.

The spelling of 56689919 in words is "fifty-six million, six hundred eighty-nine thousand, nine hundred nineteen".