57079987 has 2 divisors, whose sum is σ = 57079988. Its totient is φ = 57079986.

The previous prime is 57079973. The next prime is 57079991. The reversal of 57079987 is 78997075.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57079987 - 2¹⁵ = 57047219 is a prime.

It is not a weakly prime, because it can be changed into another prime (57079907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28539993 + 28539994.

It is an arithmetic number, because the mean of its divisors is an integer number (28539994).

Almost surely, 2^57079987 is an apocalyptic number.

57079987 is a deficient number, since it is larger than the sum of its proper divisors (1).

57079987 is an equidigital number, since it uses as much as digits as its factorization.

57079987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 52.

The square root of 57079987 is about 7555.1298466671. The cubic root of 57079987 is about 385.0300465671.

The spelling of 57079987 in words is "fifty-seven million, seventy-nine thousand, nine hundred eighty-seven".