321373057 has 2 divisors, whose sum is σ = 321373058. Its totient is φ = 321373056.

The previous prime is 321373007. The next prime is 321373067. The reversal of 321373057 is 750373123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 284394496 + 36978561 = 16864^2 + 6081^2 .

It is a cyclic number.

It is not a de Polignac number, because 321373057 - 2²³ = 312984449 is a prime.

It is not a weakly prime, because it can be changed into another prime (321373007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160686528 + 160686529.

It is an arithmetic number, because the mean of its divisors is an integer number (160686529).

Almost surely, 2^321373057 is an apocalyptic number.

It is an amenable number.

321373057 is a deficient number, since it is larger than the sum of its proper divisors (1).

321373057 is an equidigital number, since it uses as much as digits as its factorization.

321373057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13230, while the sum is 31.

The square root of 321373057 is about 17926.8808497184. The cubic root of 321373057 is about 684.9672721323.

The spelling of 321373057 in words is "three hundred twenty-one million, three hundred seventy-three thousand, fifty-seven".