320321377 has 2 divisors, whose sum is σ = 320321378. Its totient is φ = 320321376.

The previous prime is 320321369. The next prime is 320321389. The reversal of 320321377 is 773123023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177662241 + 142659136 = 13329^2 + 11944^2 .

It is a cyclic number.

It is not a de Polignac number, because 320321377 - 2³ = 320321369 is a prime.

It is a super-2 number, since 2×320321377² = 205211569126352258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (320321317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160160688 + 160160689.

It is an arithmetic number, because the mean of its divisors is an integer number (160160689).

Almost surely, 2^320321377 is an apocalyptic number.

It is an amenable number.

320321377 is a deficient number, since it is larger than the sum of its proper divisors (1).

320321377 is an equidigital number, since it uses as much as digits as its factorization.

320321377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 28.

The square root of 320321377 is about 17897.5243260067. The cubic root of 320321377 is about 684.2192799506.

The spelling of 320321377 in words is "three hundred twenty million, three hundred twenty-one thousand, three hundred seventy-seven".