12998438249 has 2 divisors, whose sum is σ = 12998438250. Its totient is φ = 12998438248.

The previous prime is 12998438237. The next prime is 12998438281. The reversal of 12998438249 is 94283489921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12536833024 + 461605225 = 111968^2 + 21485^2 .

It is a cyclic number.

It is not a de Polignac number, because 12998438249 - 2¹⁶ = 12998372713 is a prime.

It is not a weakly prime, because it can be changed into another prime (12998438209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6499219124 + 6499219125.

It is an arithmetic number, because the mean of its divisors is an integer number (6499219125).

Almost surely, 2^12998438249 is an apocalyptic number.

It is an amenable number.

12998438249 is a deficient number, since it is larger than the sum of its proper divisors (1).

12998438249 is an equidigital number, since it uses as much as digits as its factorization.

12998438249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8957952, while the sum is 59.

The spelling of 12998438249 in words is "twelve billion, nine hundred ninety-eight million, four hundred thirty-eight thousand, two hundred forty-nine".