57122687 has 2 divisors, whose sum is σ = 57122688. Its totient is φ = 57122686.

The previous prime is 57122651. The next prime is 57122693. The reversal of 57122687 is 78622175.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57122687 - 2⁶ = 57122623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57122687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57122617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28561343 + 28561344.

It is an arithmetic number, because the mean of its divisors is an integer number (28561344).

Almost surely, 2^57122687 is an apocalyptic number.

57122687 is a deficient number, since it is larger than the sum of its proper divisors (1).

57122687 is an equidigital number, since it uses as much as digits as its factorization.

57122687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 38.

The square root of 57122687 is about 7557.9552128866. The cubic root of 57122687 is about 385.1260328367.

The spelling of 57122687 in words is "fifty-seven million, one hundred twenty-two thousand, six hundred eighty-seven".