23239639 has 2 divisors, whose sum is σ = 23239640. Its totient is φ = 23239638.

The previous prime is 23239633. The next prime is 23239681. The reversal of 23239639 is 93693232.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23239639 - 2⁷ = 23239511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23239598 and 23239607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23239633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11619819 + 11619820.

It is an arithmetic number, because the mean of its divisors is an integer number (11619820).

Almost surely, 2^23239639 is an apocalyptic number.

23239639 is a deficient number, since it is larger than the sum of its proper divisors (1).

23239639 is an equidigital number, since it uses as much as digits as its factorization.

23239639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52488, while the sum is 37.

The square root of 23239639 is about 4820.7508751231. The cubic root of 23239639 is about 285.3709706966.

The spelling of 23239639 in words is "twenty-three million, two hundred thirty-nine thousand, six hundred thirty-nine".