24999244997 has 2 divisors, whose sum is σ = 24999244998. Its totient is φ = 24999244996.

The previous prime is 24999244993. The next prime is 24999245113. The reversal of 24999244997 is 79944299942.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14110113796 + 10889131201 = 118786^2 + 104351^2 .

It is a cyclic number.

It is not a de Polignac number, because 24999244997 - 2² = 24999244993 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (24999244993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12499622498 + 12499622499.

It is an arithmetic number, because the mean of its divisors is an integer number (12499622499).

Almost surely, 2^24999244997 is an apocalyptic number.

It is an amenable number.

24999244997 is a deficient number, since it is larger than the sum of its proper divisors (1).

24999244997 is an equidigital number, since it uses as much as digits as its factorization.

24999244997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105815808, while the sum is 68.

Subtracting 24999244997 from its reverse (79944299942), we obtain a palindrome (54945054945).

The spelling of 24999244997 in words is "twenty-four billion, nine hundred ninety-nine million, two hundred forty-four thousand, nine hundred ninety-seven".