320608669 has 2 divisors, whose sum is σ = 320608670. Its totient is φ = 320608668.

The previous prime is 320608649. The next prime is 320608681. The reversal of 320608669 is 966806023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197065444 + 123543225 = 14038^2 + 11115^2 .

It is a cyclic number.

It is not a de Polignac number, because 320608669 - 2⁵ = 320608637 is a prime.

It is a super-2 number, since 2×320608669² = 205579837275903122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320608609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160304334 + 160304335.

It is an arithmetic number, because the mean of its divisors is an integer number (160304335).

Almost surely, 2^320608669 is an apocalyptic number.

It is an amenable number.

320608669 is a deficient number, since it is larger than the sum of its proper divisors (1).

320608669 is an equidigital number, since it uses as much as digits as its factorization.

320608669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 320608669 is about 17905.5485534512. The cubic root of 320608669 is about 684.4237745629.

The spelling of 320608669 in words is "three hundred twenty million, six hundred eight thousand, six hundred sixty-nine".