23199989249 has 2 divisors, whose sum is σ = 23199989250. Its totient is φ = 23199989248.

The previous prime is 23199989243. The next prime is 23199989251. The reversal of 23199989249 is 94298999132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22032058624 + 1167930625 = 148432^2 + 34175^2 .

It is a cyclic number.

It is not a de Polignac number, because 23199989249 - 2⁸ = 23199988993 is a prime.

Together with 23199989251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23199989243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11599994624 + 11599994625.

It is an arithmetic number, because the mean of its divisors is an integer number (11599994625).

Almost surely, 2^23199989249 is an apocalyptic number.

It is an amenable number.

23199989249 is a deficient number, since it is larger than the sum of its proper divisors (1).

23199989249 is an equidigital number, since it uses as much as digits as its factorization.

23199989249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22674816, while the sum is 65.

The spelling of 23199989249 in words is "twenty-three billion, one hundred ninety-nine million, nine hundred eighty-nine thousand, two hundred forty-nine".