623999438089 has 2 divisors, whose sum is σ = 623999438090. Its totient is φ = 623999438088.

The previous prime is 623999437979. The next prime is 623999438093. The reversal of 623999438089 is 980834999326.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478598308864 + 145401129225 = 691808^2 + 381315^2 .

It is a cyclic number.

It is not a de Polignac number, because 623999438089 - 2⁷ = 623999437961 is a prime.

It is not a weakly prime, because it can be changed into another prime (623999438099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311999719044 + 311999719045.

It is an arithmetic number, because the mean of its divisors is an integer number (311999719045).

Almost surely, 2^623999438089 is an apocalyptic number.

It is an amenable number.

623999438089 is a deficient number, since it is larger than the sum of its proper divisors (1).

623999438089 is an equidigital number, since it uses as much as digits as its factorization.

623999438089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181398528, while the sum is 70.

The spelling of 623999438089 in words is "six hundred twenty-three billion, nine hundred ninety-nine million, four hundred thirty-eight thousand, eighty-nine".