57538909 has 2 divisors, whose sum is σ = 57538910. Its totient is φ = 57538908.

The previous prime is 57538903. The next prime is 57538927. The reversal of 57538909 is 90983575.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31304025 + 26234884 = 5595^2 + 5122^2 .

It is a cyclic number.

It is not a de Polignac number, because 57538909 - 2¹¹ = 57536861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57538903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28769454 + 28769455.

It is an arithmetic number, because the mean of its divisors is an integer number (28769455).

Almost surely, 2^57538909 is an apocalyptic number.

It is an amenable number.

57538909 is a deficient number, since it is larger than the sum of its proper divisors (1).

57538909 is an equidigital number, since it uses as much as digits as its factorization.

57538909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 57538909 is about 7585.4405936636. The cubic root of 57538909 is about 386.0591714886.

The spelling of 57538909 in words is "fifty-seven million, five hundred thirty-eight thousand, nine hundred nine".