12913709449 has 2 divisors, whose sum is σ = 12913709450. Its totient is φ = 12913709448.

The previous prime is 12913709437. The next prime is 12913709477. The reversal of 12913709449 is 94490731921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12708503824 + 205205625 = 112732^2 + 14325^2 .

It is an emirp because it is prime and its reverse (94490731921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12913709449 - 2¹³ = 12913701257 is a prime.

It is a super-3 number, since 3×12913709449³ (a number of 31 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (12913709489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6456854724 + 6456854725.

It is an arithmetic number, because the mean of its divisors is an integer number (6456854725).

Almost surely, 2^12913709449 is an apocalyptic number.

It is an amenable number.

12913709449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12913709449 is an equidigital number, since it uses as much as digits as its factorization.

12913709449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The spelling of 12913709449 in words is "twelve billion, nine hundred thirteen million, seven hundred nine thousand, four hundred forty-nine".