23639923 has 2 divisors, whose sum is σ = 23639924. Its totient is φ = 23639922.

The previous prime is 23639897. The next prime is 23639927. The reversal of 23639923 is 32993632.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23639923 - 2²¹ = 21542771 is a prime.

It is not a weakly prime, because it can be changed into another prime (23639927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11819961 + 11819962.

It is an arithmetic number, because the mean of its divisors is an integer number (11819962).

Almost surely, 2^23639923 is an apocalyptic number.

23639923 is a deficient number, since it is larger than the sum of its proper divisors (1).

23639923 is an equidigital number, since it uses as much as digits as its factorization.

23639923 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 23639923 is about 4862.0903940589. The cubic root of 23639923 is about 287.0000809366. Note that the first 4 decimals are identical.

The spelling of 23639923 in words is "twenty-three million, six hundred thirty-nine thousand, nine hundred twenty-three".