57320999 has 2 divisors, whose sum is σ = 57321000. Its totient is φ = 57320998.

The previous prime is 57320983. The next prime is 57321001. The reversal of 57320999 is 99902375.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57320999 - 2⁴ = 57320983 is a prime.

Together with 57321001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57320969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28660499 + 28660500.

It is an arithmetic number, because the mean of its divisors is an integer number (28660500).

Almost surely, 2^57320999 is an apocalyptic number.

57320999 is a deficient number, since it is larger than the sum of its proper divisors (1).

57320999 is an equidigital number, since it uses as much as digits as its factorization.

57320999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 44.

The square root of 57320999 is about 7571.0632674678. The cubic root of 57320999 is about 385.5711968888.

The spelling of 57320999 in words is "fifty-seven million, three hundred twenty thousand, nine hundred ninety-nine".