23992172989 has 4 divisors (see below), whose sum is σ = 23992668700. Its totient is φ = 23991677280.

The previous prime is 23992172983. The next prime is 23992172999. The reversal of 23992172989 is 98927129932.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12395036889 + 11597136100 = 111333^2 + 107690^2 .

It is a cyclic number.

It is not a de Polignac number, because 23992172989 - 2⁵ = 23992172957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23992172983) 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 in 3 ways as a sum of consecutive naturals, for example, 166314 + ... + 275035.

It is an arithmetic number, because the mean of its divisors is an integer number (5998167175).

Almost surely, 2^23992172989 is an apocalyptic number.

It is an amenable number.

23992172989 is a deficient number, since it is larger than the sum of its proper divisors (495711).

23992172989 is an equidigital number, since it uses as much as digits as its factorization.

23992172989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 495710.

The product of its digits is 8817984, while the sum is 61.

The spelling of 23992172989 in words is "twenty-three billion, nine hundred ninety-two million, one hundred seventy-two thousand, nine hundred eighty-nine".