12909367439 has 4 divisors (see below), whose sum is σ = 12910516080. Its totient is φ = 12908218800.

The previous prime is 12909367423. The next prime is 12909367453. The reversal of 12909367439 is 93476390921.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12909367439 - 2⁴ = 12909367423 is a prime.

It is a super-2 number, since 2×12909367439² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12909367459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557294 + ... + 579995.

It is an arithmetic number, because the mean of its divisors is an integer number (3227629020).

Almost surely, 2^12909367439 is an apocalyptic number.

12909367439 is a deficient number, since it is larger than the sum of its proper divisors (1148641).

12909367439 is a wasteful number, since it uses less digits than its factorization.

12909367439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1148640.

The product of its (nonzero) digits is 2204496, while the sum is 53.

The spelling of 12909367439 in words is "twelve billion, nine hundred nine million, three hundred sixty-seven thousand, four hundred thirty-nine".