23979563 has 2 divisors, whose sum is σ = 23979564. Its totient is φ = 23979562.

The previous prime is 23979511. The next prime is 23979583. The reversal of 23979563 is 36597932.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23979563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23979583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11989781 + 11989782.

It is an arithmetic number, because the mean of its divisors is an integer number (11989782).

Almost surely, 2^23979563 is an apocalyptic number.

23979563 is a deficient number, since it is larger than the sum of its proper divisors (1).

23979563 is an equidigital number, since it uses as much as digits as its factorization.

23979563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 306180, while the sum is 44.

The square root of 23979563 is about 4896.8931987537. The cubic root of 23979563 is about 288.3680151034.

It can be divided in two parts, 23979 and 563, that added together give a palindrome (24542).

The spelling of 23979563 in words is "twenty-three million, nine hundred seventy-nine thousand, five hundred sixty-three".