57057909 has 4 divisors (see below), whose sum is σ = 76077216. Its totient is φ = 38038604.

The previous prime is 57057907. The next prime is 57057919. The reversal of 57057909 is 90975075.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57057909 - 2¹ = 57057907 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57057901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9509649 + ... + 9509654.

It is an arithmetic number, because the mean of its divisors is an integer number (19019304).

Almost surely, 2^57057909 is an apocalyptic number.

It is an amenable number.

57057909 is a deficient number, since it is larger than the sum of its proper divisors (19019307).

57057909 is a wasteful number, since it uses less digits than its factorization.

57057909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19019306.

The product of its (nonzero) digits is 99225, while the sum is 42.

The square root of 57057909 is about 7553.6685789092. The cubic root of 57057909 is about 384.9803981699.

The spelling of 57057909 in words is "fifty-seven million, fifty-seven thousand, nine hundred nine".