23491859 has 2 divisors, whose sum is σ = 23491860. Its totient is φ = 23491858.

The previous prime is 23491829. The next prime is 23491873. The reversal of 23491859 is 95819432.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23491859 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23491829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11745929 + 11745930.

It is an arithmetic number, because the mean of its divisors is an integer number (11745930).

Almost surely, 2^23491859 is an apocalyptic number.

23491859 is a deficient number, since it is larger than the sum of its proper divisors (1).

23491859 is an equidigital number, since it uses as much as digits as its factorization.

23491859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 23491859 is about 4846.8401046455. The cubic root of 23491859 is about 286.3996361103.

The spelling of 23491859 in words is "twenty-three million, four hundred ninety-one thousand, eight hundred fifty-nine".