57081687 has 32 divisors (see below), whose sum is σ = 84295680. Its totient is φ = 34145280.

The previous prime is 57081679. The next prime is 57081697. The reversal of 57081687 is 78618075.

It is not a de Polignac number, because 57081687 - 2³ = 57081679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57081617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 298762 + ... + 298952.

It is an arithmetic number, because the mean of its divisors is an integer number (2634240).

Almost surely, 2^57081687 is an apocalyptic number.

57081687 is a deficient number, since it is larger than the sum of its proper divisors (27213993).

57081687 is a wasteful number, since it uses less digits than its factorization.

57081687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 57081687 is about 7555.2423521685. The cubic root of 57081687 is about 385.0338689494.

The spelling of 57081687 in words is "fifty-seven million, eighty-one thousand, six hundred eighty-seven".