23191907 has 2 divisors, whose sum is σ = 23191908. Its totient is φ = 23191906.

The previous prime is 23191891. The next prime is 23191957. The reversal of 23191907 is 70919132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23191907 - 2⁴ = 23191891 is a prime.

It is not a weakly prime, because it can be changed into another prime (23191957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11595953 + 11595954.

It is an arithmetic number, because the mean of its divisors is an integer number (11595954).

Almost surely, 2^23191907 is an apocalyptic number.

23191907 is a deficient number, since it is larger than the sum of its proper divisors (1).

23191907 is an equidigital number, since it uses as much as digits as its factorization.

23191907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 32.

The square root of 23191907 is about 4815.7976494035. The cubic root of 23191907 is about 285.1754618727.

The spelling of 23191907 in words is "twenty-three million, one hundred ninety-one thousand, nine hundred seven".