23998137 has 4 divisors (see below), whose sum is σ = 31997520. Its totient is φ = 15998756.

The previous prime is 23998133. The next prime is 23998141. The reversal of 23998137 is 73189932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (23998133) and next prime (23998141).

It is a cyclic number.

It is not a de Polignac number, because 23998137 - 2² = 23998133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23998133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3999687 + ... + 3999692.

It is an arithmetic number, because the mean of its divisors is an integer number (7999380).

Almost surely, 2^23998137 is an apocalyptic number.

It is an amenable number.

23998137 is a deficient number, since it is larger than the sum of its proper divisors (7999383).

23998137 is an equidigital number, since it uses as much as digits as its factorization.

23998137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7999382.

The product of its digits is 81648, while the sum is 42.

The square root of 23998137 is about 4898.7893402350. The cubic root of 23998137 is about 288.4424502268.

The spelling of 23998137 in words is "twenty-three million, nine hundred ninety-eight thousand, one hundred thirty-seven".