24639149 has 2 divisors, whose sum is σ = 24639150. Its totient is φ = 24639148.

The previous prime is 24639133. The next prime is 24639157. The reversal of 24639149 is 94193642.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20187049 + 4452100 = 4493^2 + 2110^2 .

It is a cyclic number.

It is not a de Polignac number, because 24639149 - 2⁴ = 24639133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24639119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12319574 + 12319575.

It is an arithmetic number, because the mean of its divisors is an integer number (12319575).

Almost surely, 2^24639149 is an apocalyptic number.

It is an amenable number.

24639149 is a deficient number, since it is larger than the sum of its proper divisors (1).

24639149 is an equidigital number, since it uses as much as digits as its factorization.

24639149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 24639149 is about 4963.7837382384. The cubic root of 24639149 is about 290.9881038897.

The spelling of 24639149 in words is "twenty-four million, six hundred thirty-nine thousand, one hundred forty-nine".