23137919 has 4 divisors (see below), whose sum is σ = 26443344. Its totient is φ = 19832496.

The previous prime is 23137903. The next prime is 23137921. The reversal of 23137919 is 91973132.

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

It is a cyclic number.

It is not a de Polignac number, because 23137919 - 2⁴ = 23137903 is a prime.

It is a super-2 number, since 2×23137919² = 1070726591301122, 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 (23137979) 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, 1652702 + ... + 1652715.

It is an arithmetic number, because the mean of its divisors is an integer number (6610836).

Almost surely, 2^23137919 is an apocalyptic number.

23137919 is a deficient number, since it is larger than the sum of its proper divisors (3305425).

23137919 is an equidigital number, since it uses as much as digits as its factorization.

23137919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3305424.

The product of its digits is 10206, while the sum is 35.

The square root of 23137919 is about 4810.1890815227. The cubic root of 23137919 is about 284.9540050942.

The spelling of 23137919 in words is "twenty-three million, one hundred thirty-seven thousand, nine hundred nineteen".