57881623 has 2 divisors, whose sum is σ = 57881624. Its totient is φ = 57881622.

The previous prime is 57881611. The next prime is 57881633. The reversal of 57881623 is 32618875.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57881623 - 2²¹ = 55784471 is a prime.

It is a super-2 number, since 2×57881623² = 6700564562228258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57881633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28940811 + 28940812.

It is an arithmetic number, because the mean of its divisors is an integer number (28940812).

Almost surely, 2^57881623 is an apocalyptic number.

57881623 is a deficient number, since it is larger than the sum of its proper divisors (1).

57881623 is an equidigital number, since it uses as much as digits as its factorization.

57881623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 57881623 is about 7607.9973054675. The cubic root of 57881623 is about 386.8241382814.

The spelling of 57881623 in words is "fifty-seven million, eight hundred eighty-one thousand, six hundred twenty-three".