623393261487329 has 2 divisors, whose sum is σ = 623393261487330. Its totient is φ = 623393261487328.

The previous prime is 623393261487319. The next prime is 623393261487379. The reversal of 623393261487329 is 923784162393326.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 386003037241600 + 237390224245729 = 19646960^2 + 15407473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-623393261487329 is a prime.

It is not a weakly prime, because it can be changed into another prime (623393261487319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311696630743664 + 311696630743665.

It is an arithmetic number, because the mean of its divisors is an integer number (311696630743665).

Almost surely, 2^{623393261487329} is an apocalyptic number.

It is an amenable number.

623393261487329 is a deficient number, since it is larger than the sum of its proper divisors (1).

623393261487329 is an equidigital number, since it uses as much as digits as its factorization.

623393261487329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423263232, while the sum is 68.

The spelling of 623393261487329 in words is "six hundred twenty-three trillion, three hundred ninety-three billion, two hundred sixty-one million, four hundred eighty-seven thousand, three hundred twenty-nine".