7800973913 has 4 divisors (see below), whose sum is σ = 7828735668. Its totient is φ = 7773212160.

The previous prime is 7800973909. The next prime is 7800973919. The reversal of 7800973913 is 3193790087.

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 6175916569 + 1625057344 = 78587^2 + 40312^2 .

It is a cyclic number.

It is not a de Polignac number, because 7800973913 - 2² = 7800973909 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 (7800973919) 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, 13880456 + ... + 13881017.

It is an arithmetic number, because the mean of its divisors is an integer number (1957183917).

Almost surely, 2^7800973913 is an apocalyptic number.

It is an amenable number.

7800973913 is a deficient number, since it is larger than the sum of its proper divisors (27761755).

7800973913 is a wasteful number, since it uses less digits than its factorization.

7800973913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27761754.

The product of its (nonzero) digits is 285768, while the sum is 47.

The square root of 7800973913 is about 88323.1221877941. The cubic root of 7800973913 is about 1983.2750201405.

The spelling of 7800973913 in words is "seven billion, eight hundred million, nine hundred seventy-three thousand, nine hundred thirteen".