57148939 has 2 divisors, whose sum is σ = 57148940. Its totient is φ = 57148938.

The previous prime is 57148933. The next prime is 57148981. The reversal of 57148939 is 93984175.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57148939 - 2⁵ = 57148907 is a prime.

It is not a weakly prime, because it can be changed into another prime (57148933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28574469 + 28574470.

It is an arithmetic number, because the mean of its divisors is an integer number (28574470).

Almost surely, 2^57148939 is an apocalyptic number.

57148939 is a deficient number, since it is larger than the sum of its proper divisors (1).

57148939 is an equidigital number, since it uses as much as digits as its factorization.

57148939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 57148939 is about 7559.6917265190. The cubic root of 57148939 is about 385.1850215429.

It can be divided in two parts, 57 and 148939, that added together give a square (148996 = 386²).

The spelling of 57148939 in words is "fifty-seven million, one hundred forty-eight thousand, nine hundred thirty-nine".