320312969 has 2 divisors, whose sum is σ = 320312970. Its totient is φ = 320312968.

The previous prime is 320312957. The next prime is 320312983. The reversal of 320312969 is 969213023.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 312405625 + 7907344 = 17675^2 + 2812^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320312969 is a prime.

It is a super-2 number, since 2×320312969² = 205200796219189922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (320312989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160156484 + 160156485.

It is an arithmetic number, because the mean of its divisors is an integer number (160156485).

Almost surely, 2^320312969 is an apocalyptic number.

It is an amenable number.

320312969 is a deficient number, since it is larger than the sum of its proper divisors (1).

320312969 is an equidigital number, since it uses as much as digits as its factorization.

320312969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 320312969 is about 17897.2894316430. The cubic root of 320312969 is about 684.2132932901.

The spelling of 320312969 in words is "three hundred twenty million, three hundred twelve thousand, nine hundred sixty-nine".