57298987 has 2 divisors, whose sum is σ = 57298988. Its totient is φ = 57298986.

The previous prime is 57298981. The next prime is 57298999. The reversal of 57298987 is 78989275.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57298987 - 2¹⁵ = 57266219 is a prime.

It is a super-2 number, since 2×57298987² = 6566347822452338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57298981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28649493 + 28649494.

It is an arithmetic number, because the mean of its divisors is an integer number (28649494).

Almost surely, 2^57298987 is an apocalyptic number.

57298987 is a deficient number, since it is larger than the sum of its proper divisors (1).

57298987 is an equidigital number, since it uses as much as digits as its factorization.

57298987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 55.

The square root of 57298987 is about 7569.6094351030. The cubic root of 57298987 is about 385.5218358056.

It can be divided in two parts, 57298 and 987, that added together give a palindrome (58285).

The spelling of 57298987 in words is "fifty-seven million, two hundred ninety-eight thousand, nine hundred eighty-seven".