57146987 has 4 divisors (see below), whose sum is σ = 58115640. Its totient is φ = 56178336.

The previous prime is 57146983. The next prime is 57146993. The reversal of 57146987 is 78964175.

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

It is a cyclic number.

It is not a de Polignac number, because 57146987 - 2² = 57146983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57146983) 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, 484238 + ... + 484355.

It is an arithmetic number, because the mean of its divisors is an integer number (14528910).

Almost surely, 2^57146987 is an apocalyptic number.

57146987 is a deficient number, since it is larger than the sum of its proper divisors (968653).

57146987 is an equidigital number, since it uses as much as digits as its factorization.

57146987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968652.

The product of its digits is 423360, while the sum is 47.

The square root of 57146987 is about 7559.5626196229. The cubic root of 57146987 is about 385.1806359863.

The spelling of 57146987 in words is "fifty-seven million, one hundred forty-six thousand, nine hundred eighty-seven".