23609939 has 2 divisors, whose sum is σ = 23609940. Its totient is φ = 23609938.

The previous prime is 23609917. The next prime is 23609977. The reversal of 23609939 is 93990632.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23609939 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23609896 and 23609905.

It is not a weakly prime, because it can be changed into another prime (23609909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11804969 + 11804970.

It is an arithmetic number, because the mean of its divisors is an integer number (11804970).

Almost surely, 2^23609939 is an apocalyptic number.

23609939 is a deficient number, since it is larger than the sum of its proper divisors (1).

23609939 is an equidigital number, since it uses as much as digits as its factorization.

23609939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 41.

The square root of 23609939 is about 4859.0059683026. The cubic root of 23609939 is about 286.8786895196.

The spelling of 23609939 in words is "twenty-three million, six hundred nine thousand, nine hundred thirty-nine".