23438098639 has 2 divisors, whose sum is σ = 23438098640. Its totient is φ = 23438098638.

The previous prime is 23438098627. The next prime is 23438098661. The reversal of 23438098639 is 93689083432.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23438098639 - 2²⁷ = 23303880911 is a prime.

It is a super-2 number, since 2×23438098639² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 23438098639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23438098939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11719049319 + 11719049320.

It is an arithmetic number, because the mean of its divisors is an integer number (11719049320).

Almost surely, 2^23438098639 is an apocalyptic number.

23438098639 is a deficient number, since it is larger than the sum of its proper divisors (1).

23438098639 is an equidigital number, since it uses as much as digits as its factorization.

23438098639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 23438098639 in words is "twenty-three billion, four hundred thirty-eight million, ninety-eight thousand, six hundred thirty-nine".