623426257 has 2 divisors, whose sum is σ = 623426258. Its totient is φ = 623426256.

The previous prime is 623426207. The next prime is 623426267. The reversal of 623426257 is 752624326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621455041 + 1971216 = 24929^2 + 1404^2 .

It is a cyclic number.

It is not a de Polignac number, because 623426257 - 2⁷ = 623426129 is a prime.

It is not a weakly prime, because it can be changed into another prime (623426207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311713128 + 311713129.

It is an arithmetic number, because the mean of its divisors is an integer number (311713129).

Almost surely, 2^623426257 is an apocalyptic number.

It is an amenable number.

623426257 is a deficient number, since it is larger than the sum of its proper divisors (1).

623426257 is an equidigital number, since it uses as much as digits as its factorization.

623426257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 37.

The square root of 623426257 is about 24968.5053016796. The cubic root of 623426257 is about 854.2697534637.

The spelling of 623426257 in words is "six hundred twenty-three million, four hundred twenty-six thousand, two hundred fifty-seven".