23190391 has 8 divisors (see below), whose sum is σ = 26537984. Its totient is φ = 19851480.

The previous prime is 23190389. The next prime is 23190407. The reversal of 23190391 is 19309132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23190391 - 2¹ = 23190389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23190311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5266 + ... + 8608.

It is an arithmetic number, because the mean of its divisors is an integer number (3317248).

Almost surely, 2^23190391 is an apocalyptic number.

23190391 is a deficient number, since it is larger than the sum of its proper divisors (3347593).

23190391 is an equidigital number, since it uses as much as digits as its factorization.

23190391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4341.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 23190391 is about 4815.6402481913. The cubic root of 23190391 is about 285.1692479892.

The spelling of 23190391 in words is "twenty-three million, one hundred ninety thousand, three hundred ninety-one".