23491939 has 2 divisors, whose sum is σ = 23491940. Its totient is φ = 23491938.

The previous prime is 23491921. The next prime is 23491967. The reversal of 23491939 is 93919432.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23491939 - 2⁵ = 23491907 is a prime.

It is not a weakly prime, because it can be changed into another prime (23491969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11745969 + 11745970.

It is an arithmetic number, because the mean of its divisors is an integer number (11745970).

Almost surely, 2^23491939 is an apocalyptic number.

23491939 is a deficient number, since it is larger than the sum of its proper divisors (1).

23491939 is an equidigital number, since it uses as much as digits as its factorization.

23491939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 40.

The square root of 23491939 is about 4846.8483574381. The cubic root of 23491939 is about 286.3999612151.

The spelling of 23491939 in words is "twenty-three million, four hundred ninety-one thousand, nine hundred thirty-nine".