23919619 has 2 divisors, whose sum is σ = 23919620. Its totient is φ = 23919618.

The previous prime is 23919617. The next prime is 23919659. The reversal of 23919619 is 91691932.

It is an a-pointer prime, because the next prime (23919659) can be obtained adding 23919619 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23919619 - 2¹ = 23919617 is a prime.

It is a super-2 number, since 2×23919619² = 1144296346210322, which contains 22 as substring.

Together with 23919617, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (23919617) 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, 11959809 + 11959810.

It is an arithmetic number, because the mean of its divisors is an integer number (11959810).

Almost surely, 2^23919619 is an apocalyptic number.

23919619 is a deficient number, since it is larger than the sum of its proper divisors (1).

23919619 is an equidigital number, since it uses as much as digits as its factorization.

23919619 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 40.

The square root of 23919619 is about 4890.7687534783. The cubic root of 23919619 is about 288.1275275947.

The spelling of 23919619 in words is "twenty-three million, nine hundred nineteen thousand, six hundred nineteen".