12739097991 has 8 divisors (see below), whose sum is σ = 17005240960. Its totient is φ = 8482843512.

The previous prime is 12739097981. The next prime is 12739098007. The reversal of 12739097991 is 19979093721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12739097991 - 2¹³ = 12739089799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739097911) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2469115 + ... + 2474268.

It is an arithmetic number, because the mean of its divisors is an integer number (2125655120).

Almost surely, 2^12739097991 is an apocalyptic number.

12739097991 is a deficient number, since it is larger than the sum of its proper divisors (4266142969).

12739097991 is an equidigital number, since it uses as much as digits as its factorization.

12739097991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4944245.

The product of its (nonzero) digits is 1928934, while the sum is 57.

The spelling of 12739097991 in words is "twelve billion, seven hundred thirty-nine million, ninety-seven thousand, nine hundred ninety-one".