623354900657 has 2 divisors, whose sum is σ = 623354900658. Its totient is φ = 623354900656.

The previous prime is 623354900653. The next prime is 623354900687. The reversal of 623354900657 is 756009453326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 572623644961 + 50731255696 = 756719^2 + 225236^2 .

It is a cyclic number.

It is not a de Polignac number, because 623354900657 - 2² = 623354900653 is a prime.

It is not a weakly prime, because it can be changed into another prime (623354900653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311677450328 + 311677450329.

It is an arithmetic number, because the mean of its divisors is an integer number (311677450329).

Almost surely, 2^623354900657 is an apocalyptic number.

It is an amenable number.

623354900657 is a deficient number, since it is larger than the sum of its proper divisors (1).

623354900657 is an equidigital number, since it uses as much as digits as its factorization.

623354900657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4082400, while the sum is 50.

The spelling of 623354900657 in words is "six hundred twenty-three billion, three hundred fifty-four million, nine hundred thousand, six hundred fifty-seven".