57138901 has 2 divisors, whose sum is σ = 57138902. Its totient is φ = 57138900.

The previous prime is 57138899. The next prime is 57138919. The reversal of 57138901 is 10983175.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32148900 + 24990001 = 5670^2 + 4999^2 .

It is a cyclic number.

It is not a de Polignac number, because 57138901 - 2¹ = 57138899 is a prime.

Together with 57138899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57138971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28569450 + 28569451.

It is an arithmetic number, because the mean of its divisors is an integer number (28569451).

Almost surely, 2^57138901 is an apocalyptic number.

57138901 is the 3381-st centered decagonal number.

It is an amenable number.

57138901 is a deficient number, since it is larger than the sum of its proper divisors (1).

57138901 is an equidigital number, since it uses as much as digits as its factorization.

57138901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 34.

The square root of 57138901 is about 7559.0277814015. The cubic root of 57138901 is about 385.1624681137.

The spelling of 57138901 in words is "fifty-seven million, one hundred thirty-eight thousand, nine hundred one".