23091791 has 2 divisors, whose sum is σ = 23091792. Its totient is φ = 23091790.

The previous prime is 23091787. The next prime is 23091857. The reversal of 23091791 is 19719032.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23091791 - 2² = 23091787 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23091781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11545895 + 11545896.

It is an arithmetic number, because the mean of its divisors is an integer number (11545896).

Almost surely, 2^23091791 is an apocalyptic number.

23091791 is a deficient number, since it is larger than the sum of its proper divisors (1).

23091791 is an equidigital number, since it uses as much as digits as its factorization.

23091791 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 23091791 is about 4805.3918674755. The cubic root of 23091791 is about 284.7645166770.

The spelling of 23091791 in words is "twenty-three million, ninety-one thousand, seven hundred ninety-one".