23169491 has 2 divisors, whose sum is σ = 23169492. Its totient is φ = 23169490.

The previous prime is 23169481. The next prime is 23169539. The reversal of 23169491 is 19496132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23169491 is a prime.

It is not a weakly prime, because it can be changed into another prime (23169481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11584745 + 11584746.

It is an arithmetic number, because the mean of its divisors is an integer number (11584746).

Almost surely, 2^23169491 is an apocalyptic number.

23169491 is a deficient number, since it is larger than the sum of its proper divisors (1).

23169491 is an equidigital number, since it uses as much as digits as its factorization.

23169491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 23169491 is about 4813.4697464511. The cubic root of 23169491 is about 285.0835540389.

The spelling of 23169491 in words is "twenty-three million, one hundred sixty-nine thousand, four hundred ninety-one".