57392987 has 4 divisors (see below), whose sum is σ = 57426960. Its totient is φ = 57359016.

The previous prime is 57392953. The next prime is 57393013. The reversal of 57392987 is 78929375.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57392987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57332987) 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 3 ways as a sum of consecutive naturals, for example, 14312 + ... + 17877.

It is an arithmetic number, because the mean of its divisors is an integer number (14356740).

Almost surely, 2^57392987 is an apocalyptic number.

57392987 is a deficient number, since it is larger than the sum of its proper divisors (33973).

57392987 is a wasteful number, since it uses less digits than its factorization.

57392987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33972.

The product of its digits is 952560, while the sum is 50.

The square root of 57392987 is about 7575.8159296540. The cubic root of 57392987 is about 385.7325390865.

The spelling of 57392987 in words is "fifty-seven million, three hundred ninety-two thousand, nine hundred eighty-seven".