79487273869 has 4 divisors (see below), whose sum is σ = 79562051296. Its totient is φ = 79412496444.

The previous prime is 79487273861. The next prime is 79487273897. The reversal of 79487273869 is 96837278497.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 79487273869 - 2³ = 79487273861 is a prime.

It is a super-2 number, since 2×79487273869² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79487273798 and 79487273807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79487273861) 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, 37387119 + ... + 37389244.

It is an arithmetic number, because the mean of its divisors is an integer number (19890512824).

Almost surely, 2^79487273869 is an apocalyptic number.

It is an amenable number.

79487273869 is a deficient number, since it is larger than the sum of its proper divisors (74777427).

79487273869 is a wasteful number, since it uses less digits than its factorization.

79487273869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74777426.

The product of its digits is 256048128, while the sum is 70.

The spelling of 79487273869 in words is "seventy-nine billion, four hundred eighty-seven million, two hundred seventy-three thousand, eight hundred sixty-nine".