56975987 has 2 divisors, whose sum is σ = 56975988. Its totient is φ = 56975986.

The previous prime is 56975977. The next prime is 56976001. The reversal of 56975987 is 78957965.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56975987 - 2¹⁰ = 56974963 is a prime.

It is not a weakly prime, because it can be changed into another prime (56975977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28487993 + 28487994.

It is an arithmetic number, because the mean of its divisors is an integer number (28487994).

Almost surely, 2^56975987 is an apocalyptic number.

56975987 is a deficient number, since it is larger than the sum of its proper divisors (1).

56975987 is an equidigital number, since it uses as much as digits as its factorization.

56975987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4762800, while the sum is 56.

The square root of 56975987 is about 7548.2439679703. The cubic root of 56975987 is about 384.7960622282.

The spelling of 56975987 in words is "fifty-six million, nine hundred seventy-five thousand, nine hundred eighty-seven".