23390291 has 2 divisors, whose sum is σ = 23390292. Its totient is φ = 23390290.

The previous prime is 23390243. The next prime is 23390293. The reversal of 23390291 is 19209332.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23390291 - 2²² = 19195987 is a prime.

Together with 23390293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23390293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11695145 + 11695146.

It is an arithmetic number, because the mean of its divisors is an integer number (11695146).

Almost surely, 2^23390291 is an apocalyptic number.

23390291 is a deficient number, since it is larger than the sum of its proper divisors (1).

23390291 is an equidigital number, since it uses as much as digits as its factorization.

23390291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 23390291 is about 4836.3510004961. The cubic root of 23390291 is about 285.9862863654.

The spelling of 23390291 in words is "twenty-three million, three hundred ninety thousand, two hundred ninety-one".