24639929 has 2 divisors, whose sum is σ = 24639930. Its totient is φ = 24639928.

The previous prime is 24639907. The next prime is 24639949. The reversal of 24639929 is 92993642.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22231225 + 2408704 = 4715^2 + 1552^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24639929 is a prime.

It is a super-2 number, since 2×24639929² = 1214252202250082, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 24639929.

It is not a weakly prime, because it can be changed into another prime (24639949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12319964 + 12319965.

It is an arithmetic number, because the mean of its divisors is an integer number (12319965).

Almost surely, 2^24639929 is an apocalyptic number.

It is an amenable number.

24639929 is a deficient number, since it is larger than the sum of its proper divisors (1).

24639929 is an equidigital number, since it uses as much as digits as its factorization.

24639929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 44.

The square root of 24639929 is about 4963.8623067124. The cubic root of 24639929 is about 290.9911744547.

The spelling of 24639929 in words is "twenty-four million, six hundred thirty-nine thousand, nine hundred twenty-nine".