23090915 has 4 divisors (see below), whose sum is σ = 27709104. Its totient is φ = 18472728.

The previous prime is 23090897. The next prime is 23090917. The reversal of 23090915 is 51909032.

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 23090915 - 2²² = 18896611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23090917) 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, 2309087 + ... + 2309096.

It is an arithmetic number, because the mean of its divisors is an integer number (6927276).

Almost surely, 2^23090915 is an apocalyptic number.

23090915 is a deficient number, since it is larger than the sum of its proper divisors (4618189).

23090915 is an equidigital number, since it uses as much as digits as its factorization.

23090915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4618188.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 23090915 is about 4805.3007189977. The cubic root of 23090915 is about 284.7609157311.

Adding to 23090915 its reverse (51909032), we get a palindrome (74999947).

The spelling of 23090915 in words is "twenty-three million, ninety thousand, nine hundred fifteen".