24997139 has 2 divisors, whose sum is σ = 24997140. Its totient is φ = 24997138.

The previous prime is 24997127. The next prime is 24997151. The reversal of 24997139 is 93179942.

It is a balanced prime because it is at equal distance from previous prime (24997127) and next prime (24997151).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-24997139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 24997139.

It is not a weakly prime, because it can be changed into another prime (24997169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12498569 + 12498570.

It is an arithmetic number, because the mean of its divisors is an integer number (12498570).

Almost surely, 2^24997139 is an apocalyptic number.

24997139 is a deficient number, since it is larger than the sum of its proper divisors (1).

24997139 is an equidigital number, since it uses as much as digits as its factorization.

24997139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 44.

The square root of 24997139 is about 4999.7138918142. The cubic root of 24997139 is about 292.3906192428.

The spelling of 24997139 in words is "twenty-four million, nine hundred ninety-seven thousand, one hundred thirty-nine".