23139919 has 18 divisors (see below), whose sum is σ = 26413800. Its totient is φ = 20255400.

The previous prime is 23139917. The next prime is 23139931. The reversal of 23139919 is 91993132.

It is not a de Polignac number, because 23139919 - 2¹ = 23139917 is a prime.

It is a super-2 number, since 2×23139919² = 1070911702653122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23139913) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 116182 + ... + 116380.

Almost surely, 2^23139919 is an apocalyptic number.

23139919 is a deficient number, since it is larger than the sum of its proper divisors (3273881).

23139919 is a wasteful number, since it uses less digits than its factorization.

23139919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 241 counting only the distinct ones).

The product of its digits is 13122, while the sum is 37.

The square root of 23139919 is about 4810.3969690661. The cubic root of 23139919 is about 284.9622151611.

The spelling of 23139919 in words is "twenty-three million, one hundred thirty-nine thousand, nine hundred nineteen".