23197819 has 2 divisors, whose sum is σ = 23197820. Its totient is φ = 23197818.

The previous prime is 23197813. The next prime is 23197829. The reversal of 23197819 is 91879132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23197819 - 2¹⁹ = 22673531 is a prime.

It is a super-2 number, since 2×23197819² = 1076277612713522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23197813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11598909 + 11598910.

It is an arithmetic number, because the mean of its divisors is an integer number (11598910).

Almost surely, 2^23197819 is an apocalyptic number.

23197819 is a deficient number, since it is larger than the sum of its proper divisors (1).

23197819 is an equidigital number, since it uses as much as digits as its factorization.

23197819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 40.

The square root of 23197819 is about 4816.4114234563. The cubic root of 23197819 is about 285.1996917918.

The spelling of 23197819 in words is "twenty-three million, one hundred ninety-seven thousand, eight hundred nineteen".