321311377 has 2 divisors, whose sum is σ = 321311378. Its totient is φ = 321311376.

The previous prime is 321311371. The next prime is 321311447. The reversal of 321311377 is 773113123.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 304014096 + 17297281 = 17436^2 + 4159^2 .

It is a cyclic number.

It is not a de Polignac number, because 321311377 - 2²³ = 312922769 is a prime.

It is a super-2 number, since 2×321311377² = 206482001979272258, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (321311371) 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, 160655688 + 160655689.

It is an arithmetic number, because the mean of its divisors is an integer number (160655689).

Almost surely, 2^321311377 is an apocalyptic number.

It is an amenable number.

321311377 is a deficient number, since it is larger than the sum of its proper divisors (1).

321311377 is an equidigital number, since it uses as much as digits as its factorization.

321311377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646, while the sum is 28.

The square root of 321311377 is about 17925.1604455860. The cubic root of 321311377 is about 684.9234482091.

The spelling of 321311377 in words is "three hundred twenty-one million, three hundred eleven thousand, three hundred seventy-seven".