57189893 has 2 divisors, whose sum is σ = 57189894. Its totient is φ = 57189892.

The previous prime is 57189889. The next prime is 57189907. The reversal of 57189893 is 39898175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56821444 + 368449 = 7538^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 57189893 - 2² = 57189889 is a prime.

It is a super-2 number, since 2×57189893² = 6541367722702898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57189833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28594946 + 28594947.

It is an arithmetic number, because the mean of its divisors is an integer number (28594947).

Almost surely, 2^57189893 is an apocalyptic number.

It is an amenable number.

57189893 is a deficient number, since it is larger than the sum of its proper divisors (1).

57189893 is an equidigital number, since it uses as much as digits as its factorization.

57189893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 50.

The square root of 57189893 is about 7562.3999497514. The cubic root of 57189893 is about 385.2770098397.

The spelling of 57189893 in words is "fifty-seven million, one hundred eighty-nine thousand, eight hundred ninety-three".