23091091 has 2 divisors, whose sum is σ = 23091092. Its totient is φ = 23091090.

The previous prime is 23091073. The next prime is 23091113. The reversal of 23091091 is 19019032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23091091 - 2⁵ = 23091059 is a prime.

It is not a weakly prime, because it can be changed into another prime (23091041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11545545 + 11545546.

It is an arithmetic number, because the mean of its divisors is an integer number (11545546).

Almost surely, 2^23091091 is an apocalyptic number.

23091091 is a deficient number, since it is larger than the sum of its proper divisors (1).

23091091 is an equidigital number, since it uses as much as digits as its factorization.

23091091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 23091091 is about 4805.3190320727. The cubic root of 23091091 is about 284.7616392161.

The spelling of 23091091 in words is "twenty-three million, ninety-one thousand, ninety-one".