57086987 has 2 divisors, whose sum is σ = 57086988. Its totient is φ = 57086986.

The previous prime is 57086971. The next prime is 57087007. The reversal of 57086987 is 78968075.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57086987 - 2⁴ = 57086971 is a prime.

It is not a weakly prime, because it can be changed into another prime (57086947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28543493 + 28543494.

It is an arithmetic number, because the mean of its divisors is an integer number (28543494).

Almost surely, 2^57086987 is an apocalyptic number.

57086987 is a deficient number, since it is larger than the sum of its proper divisors (1).

57086987 is an equidigital number, since it uses as much as digits as its factorization.

57086987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 57086987 is about 7555.5930938610. The cubic root of 57086987 is about 385.0457853009.

The spelling of 57086987 in words is "fifty-seven million, eighty-six thousand, nine hundred eighty-seven".