320479979 has 2 divisors, whose sum is σ = 320479980. Its totient is φ = 320479978.

The previous prime is 320479967. The next prime is 320479987. The reversal of 320479979 is 979974023.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320479979 is a prime.

It is not a weakly prime, because it can be changed into another prime (320479919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160239989 + 160239990.

It is an arithmetic number, because the mean of its divisors is an integer number (160239990).

Almost surely, 2^320479979 is an apocalyptic number.

320479979 is a deficient number, since it is larger than the sum of its proper divisors (1).

320479979 is an equidigital number, since it uses as much as digits as its factorization.

320479979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 50.

The square root of 320479979 is about 17901.9546139521. The cubic root of 320479979 is about 684.3321880574.

The spelling of 320479979 in words is "three hundred twenty million, four hundred seventy-nine thousand, nine hundred seventy-nine".