57029939 has 2 divisors, whose sum is σ = 57029940. Its totient is φ = 57029938.

The previous prime is 57029909. The next prime is 57029957. The reversal of 57029939 is 93992075.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57029939 - 2⁸ = 57029683 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57029939.

It is not a weakly prime, because it can be changed into another prime (57029909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28514969 + 28514970.

It is an arithmetic number, because the mean of its divisors is an integer number (28514970).

Almost surely, 2^57029939 is an apocalyptic number.

57029939 is a deficient number, since it is larger than the sum of its proper divisors (1).

57029939 is an equidigital number, since it uses as much as digits as its factorization.

57029939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 57029939 is about 7551.8169336922. The cubic root of 57029939 is about 384.9174816121.

The spelling of 57029939 in words is "fifty-seven million, twenty-nine thousand, nine hundred thirty-nine".