23719939 has 2 divisors, whose sum is σ = 23719940. Its totient is φ = 23719938.

The previous prime is 23719937. The next prime is 23719967. The reversal of 23719939 is 93991732.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23719939 - 2¹ = 23719937 is a prime.

Together with 23719937, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 23719895 and 23719904.

It is not a weakly prime, because it can be changed into another prime (23719931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11859969 + 11859970.

It is an arithmetic number, because the mean of its divisors is an integer number (11859970).

Almost surely, 2^23719939 is an apocalyptic number.

23719939 is a deficient number, since it is larger than the sum of its proper divisors (1).

23719939 is an equidigital number, since it uses as much as digits as its factorization.

23719939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 43.

The square root of 23719939 is about 4870.3120023259. The cubic root of 23719939 is about 287.3235272387.

The spelling of 23719939 in words is "twenty-three million, seven hundred nineteen thousand, nine hundred thirty-nine".