320699923 has 2 divisors, whose sum is σ = 320699924. Its totient is φ = 320699922.

The previous prime is 320699903. The next prime is 320699933. The reversal of 320699923 is 329996023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320699923 - 2⁹ = 320699411 is a prime.

It is a super-2 number, since 2×320699923² = 205696881224411858, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 320699923.

It is not a weakly prime, because it can be changed into another prime (320699903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160349961 + 160349962.

It is an arithmetic number, because the mean of its divisors is an integer number (160349962).

Almost surely, 2^320699923 is an apocalyptic number.

320699923 is a deficient number, since it is larger than the sum of its proper divisors (1).

320699923 is an equidigital number, since it uses as much as digits as its factorization.

320699923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 43.

The square root of 320699923 is about 17908.0965766884. The cubic root of 320699923 is about 684.4887036478.

The spelling of 320699923 in words is "three hundred twenty million, six hundred ninety-nine thousand, nine hundred twenty-three".