623715457 has 2 divisors, whose sum is σ = 623715458. Its totient is φ = 623715456.

The previous prime is 623715437. The next prime is 623715461. The reversal of 623715457 is 754517326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 428945521 + 194769936 = 20711^2 + 13956^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623715457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (623715437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311857728 + 311857729.

It is an arithmetic number, because the mean of its divisors is an integer number (311857729).

Almost surely, 2^623715457 is an apocalyptic number.

It is an amenable number.

623715457 is a deficient number, since it is larger than the sum of its proper divisors (1).

623715457 is an equidigital number, since it uses as much as digits as its factorization.

623715457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 40.

The square root of 623715457 is about 24974.2959260116. The cubic root of 623715457 is about 854.4018282242.

The spelling of 623715457 in words is "six hundred twenty-three million, seven hundred fifteen thousand, four hundred fifty-seven".