623316257 has 2 divisors, whose sum is σ = 623316258. Its totient is φ = 623316256.

The previous prime is 623316251. The next prime is 623316259. The reversal of 623316257 is 752613326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 566630416 + 56685841 = 23804^2 + 7529^2 .

It is a cyclic number.

It is not a de Polignac number, because 623316257 - 2⁶ = 623316193 is a prime.

Together with 623316259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (623316251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311658128 + 311658129.

It is an arithmetic number, because the mean of its divisors is an integer number (311658129).

Almost surely, 2^623316257 is an apocalyptic number.

It is an amenable number.

623316257 is a deficient number, since it is larger than the sum of its proper divisors (1).

623316257 is an equidigital number, since it uses as much as digits as its factorization.

623316257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 35.

The square root of 623316257 is about 24966.3024294748. The cubic root of 623316257 is about 854.2195068365.

The spelling of 623316257 in words is "six hundred twenty-three million, three hundred sixteen thousand, two hundred fifty-seven".