79709988473 has 4 divisors (see below), whose sum is σ = 79923688548. Its totient is φ = 79496288400.

The previous prime is 79709988451. The next prime is 79709988487. The reversal of 79709988473 is 37488990797.

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 41882850409 + 37827138064 = 204653^2 + 194492^2 .

It is a cyclic number.

It is not a de Polignac number, because 79709988473 - 2⁸ = 79709988217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79709988397 and 79709988406.

It is not an unprimeable number, because it can be changed into a prime (79709948473) 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, 106849478 + ... + 106850223.

It is an arithmetic number, because the mean of its divisors is an integer number (19980922137).

Almost surely, 2^79709988473 is an apocalyptic number.

It is an amenable number.

79709988473 is a deficient number, since it is larger than the sum of its proper divisors (213700075).

79709988473 is a wasteful number, since it uses less digits than its factorization.

79709988473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213700074.

The product of its (nonzero) digits is 192036096, while the sum is 71.

The spelling of 79709988473 in words is "seventy-nine billion, seven hundred nine million, nine hundred eighty-eight thousand, four hundred seventy-three".