57131923 has 2 divisors, whose sum is σ = 57131924. Its totient is φ = 57131922.

The previous prime is 57131909. The next prime is 57131927. The reversal of 57131923 is 32913175.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57131923 is a prime.

It is not a weakly prime, because it can be changed into another prime (57131927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28565961 + 28565962.

It is an arithmetic number, because the mean of its divisors is an integer number (28565962).

Almost surely, 2^57131923 is an apocalyptic number.

57131923 is a deficient number, since it is larger than the sum of its proper divisors (1).

57131923 is an equidigital number, since it uses as much as digits as its factorization.

57131923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5670, while the sum is 31.

The square root of 57131923 is about 7558.5662000144. The cubic root of 57131923 is about 385.1467883516.

The spelling of 57131923 in words is "fifty-seven million, one hundred thirty-one thousand, nine hundred twenty-three".