72797961239 has 4 divisors (see below), whose sum is σ = 72806991240. Its totient is φ = 72788931240.

The previous prime is 72797961233. The next prime is 72797961263. The reversal of 72797961239 is 93216979727.

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 72797961239 - 2²⁰ = 72796912663 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 (72797961233) 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, 4502897 + ... + 4519034.

It is an arithmetic number, because the mean of its divisors is an integer number (18201747810).

Almost surely, 2^72797961239 is an apocalyptic number.

72797961239 is a deficient number, since it is larger than the sum of its proper divisors (9030001).

72797961239 is an equidigital number, since it uses as much as digits as its factorization.

72797961239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030000.

The product of its digits is 18003384, while the sum is 62.

The spelling of 72797961239 in words is "seventy-two billion, seven hundred ninety-seven million, nine hundred sixty-one thousand, two hundred thirty-nine".