320122139 has 2 divisors, whose sum is σ = 320122140. Its totient is φ = 320122138.

The previous prime is 320122129. The next prime is 320122177. The reversal of 320122139 is 931221023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320122139 - 2²⁸ = 51686683 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (320122129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160061069 + 160061070.

It is an arithmetic number, because the mean of its divisors is an integer number (160061070).

Almost surely, 2^320122139 is an apocalyptic number.

320122139 is a deficient number, since it is larger than the sum of its proper divisors (1).

320122139 is an equidigital number, since it uses as much as digits as its factorization.

320122139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 320122139 is about 17891.9573831373. The cubic root of 320122139 is about 684.0773904147.

The spelling of 320122139 in words is "three hundred twenty million, one hundred twenty-two thousand, one hundred thirty-nine".