57811087 has 4 divisors (see below), whose sum is σ = 58383576. Its totient is φ = 57238600.

The previous prime is 57811079. The next prime is 57811097. The reversal of 57811087 is 78011875.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57811087 - 2³ = 57811079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57811037) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286093 + ... + 286294.

It is an arithmetic number, because the mean of its divisors is an integer number (14595894).

Almost surely, 2^57811087 is an apocalyptic number.

57811087 is a deficient number, since it is larger than the sum of its proper divisors (572489).

57811087 is a wasteful number, since it uses less digits than its factorization.

57811087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572488.

The product of its (nonzero) digits is 15680, while the sum is 37.

The square root of 57811087 is about 7603.3602439974. The cubic root of 57811087 is about 386.6669432056. Note that the first 3 decimals are identical.

The spelling of 57811087 in words is "fifty-seven million, eight hundred eleven thousand, eighty-seven".