7792720913 has 4 divisors (see below), whose sum is σ = 7873058340. Its totient is φ = 7712383488.

The previous prime is 7792720891. The next prime is 7792720973. The reversal of 7792720913 is 3190272977.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3606242704 + 4186478209 = 60052^2 + 64703^2 .

It is a cyclic number.

It is not a de Polignac number, because 7792720913 - 2²⁶ = 7725612049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7792720973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40168568 + ... + 40168761.

It is an arithmetic number, because the mean of its divisors is an integer number (1968264585).

Almost surely, 2^7792720913 is an apocalyptic number.

It is an amenable number.

7792720913 is a deficient number, since it is larger than the sum of its proper divisors (80337427).

7792720913 is an equidigital number, since it uses as much as digits as its factorization.

7792720913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80337426.

The product of its (nonzero) digits is 333396, while the sum is 47.

The square root of 7792720913 is about 88276.3893291972. The cubic root of 7792720913 is about 1982.5753748375.

The spelling of 7792720913 in words is "seven billion, seven hundred ninety-two million, seven hundred twenty thousand, nine hundred thirteen".