57109979 has 2 divisors, whose sum is σ = 57109980. Its totient is φ = 57109978.

The previous prime is 57109973. The next prime is 57109999. The reversal of 57109979 is 97990175.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57109979 - 2⁴ = 57109963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57109973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28554989 + 28554990.

It is an arithmetic number, because the mean of its divisors is an integer number (28554990).

Almost surely, 2^57109979 is an apocalyptic number.

57109979 is a deficient number, since it is larger than the sum of its proper divisors (1).

57109979 is an equidigital number, since it uses as much as digits as its factorization.

57109979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 57109979 is about 7557.1144625445. The cubic root of 57109979 is about 385.0974712449.

The spelling of 57109979 in words is "fifty-seven million, one hundred nine thousand, nine hundred seventy-nine".