56921889 has 8 divisors (see below), whose sum is σ = 76167072. Its totient is φ = 37812320.

The previous prime is 56921881. The next prime is 56921897. The reversal of 56921889 is 98812965.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (56921881) and next prime (56921897).

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 56921889 - 2³ = 56921881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (56921881) 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, 32919 + ... + 34604.

It is an arithmetic number, because the mean of its divisors is an integer number (9520884).

Almost surely, 2^56921889 is an apocalyptic number.

It is an amenable number.

56921889 is a deficient number, since it is larger than the sum of its proper divisors (19245183).

56921889 is a wasteful number, since it uses less digits than its factorization.

56921889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67807.

The product of its digits is 311040, while the sum is 48.

The square root of 56921889 is about 7544.6596344699. The cubic root of 56921889 is about 384.6742372843.

The spelling of 56921889 in words is "fifty-six million, nine hundred twenty-one thousand, eight hundred eighty-nine".