23539739 has 2 divisors, whose sum is σ = 23539740. Its totient is φ = 23539738.

The previous prime is 23539729. The next prime is 23539759. The reversal of 23539739 is 93793532.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23539739 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23539696 and 23539705.

It is not a weakly prime, because it can be changed into another prime (23539729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11769869 + 11769870.

It is an arithmetic number, because the mean of its divisors is an integer number (11769870).

Almost surely, 2^23539739 is an apocalyptic number.

23539739 is a deficient number, since it is larger than the sum of its proper divisors (1).

23539739 is an equidigital number, since it uses as much as digits as its factorization.

23539739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 41.

The square root of 23539739 is about 4851.7768909957. The cubic root of 23539739 is about 286.5940794824.

The spelling of 23539739 in words is "twenty-three million, five hundred thirty-nine thousand, seven hundred thirty-nine".