23117819 has 2 divisors, whose sum is σ = 23117820. Its totient is φ = 23117818.

The previous prime is 23117803. The next prime is 23117827. The reversal of 23117819 is 91871132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23117819 - 2⁴ = 23117803 is a prime.

It is a super-2 number, since 2×23117819² = 1068867110633522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23117869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11558909 + 11558910.

It is an arithmetic number, because the mean of its divisors is an integer number (11558910).

Almost surely, 2^23117819 is an apocalyptic number.

23117819 is a deficient number, since it is larger than the sum of its proper divisors (1).

23117819 is an equidigital number, since it uses as much as digits as its factorization.

23117819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 32.

The square root of 23117819 is about 4808.0993126182. The cubic root of 23117819 is about 284.8714676394.

The spelling of 23117819 in words is "twenty-three million, one hundred seventeen thousand, eight hundred nineteen".