623459257 has 2 divisors, whose sum is σ = 623459258. Its totient is φ = 623459256.

The previous prime is 623459251. The next prime is 623459297. The reversal of 623459257 is 752954326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 568536336 + 54922921 = 23844^2 + 7411^2 .

It is a cyclic number.

It is not a de Polignac number, because 623459257 - 2²³ = 615070649 is a prime.

It is not a weakly prime, because it can be changed into another prime (623459251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311729628 + 311729629.

It is an arithmetic number, because the mean of its divisors is an integer number (311729629).

Almost surely, 2^623459257 is an apocalyptic number.

It is an amenable number.

623459257 is a deficient number, since it is larger than the sum of its proper divisors (1).

623459257 is an equidigital number, since it uses as much as digits as its factorization.

623459257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 43.

The square root of 623459257 is about 24969.1661254436. The cubic root of 623459257 is about 854.2848262994.

The spelling of 623459257 in words is "six hundred twenty-three million, four hundred fifty-nine thousand, two hundred fifty-seven".