57370921 has 2 divisors, whose sum is σ = 57370922. Its totient is φ = 57370920.

The previous prime is 57370909. The next prime is 57370967. The reversal of 57370921 is 12907375.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46717225 + 10653696 = 6835^2 + 3264^2 .

It is a cyclic number.

It is not a de Polignac number, because 57370921 - 2⁵ = 57370889 is a prime.

It is not a weakly prime, because it can be changed into another prime (57370981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28685460 + 28685461.

It is an arithmetic number, because the mean of its divisors is an integer number (28685461).

Almost surely, 2^57370921 is an apocalyptic number.

It is an amenable number.

57370921 is a deficient number, since it is larger than the sum of its proper divisors (1).

57370921 is an equidigital number, since it uses as much as digits as its factorization.

57370921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 57370921 is about 7574.3594448640. The cubic root of 57370921 is about 385.6830982883.

The spelling of 57370921 in words is "fifty-seven million, three hundred seventy thousand, nine hundred twenty-one".