79873437897 has 36 divisors (see below), whose sum is σ = 128964173520. Its totient is φ = 47587628880.

The previous prime is 79873437893. The next prime is 79873437971.

79873437897 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 79873437897 - 2² = 79873437893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79873437893) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 557323 + ... + 685824.

Almost surely, 2^79873437897 is an apocalyptic number.

It is an amenable number.

79873437897 is a deficient number, since it is larger than the sum of its proper divisors (49090735623).

79873437897 is a wasteful number, since it uses less digits than its factorization.

79873437897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1243234 (or 1243220 counting only the distinct ones).

The product of its digits is 448084224, while the sum is 72.

The spelling of 79873437897 in words is "seventy-nine billion, eight hundred seventy-three million, four hundred thirty-seven thousand, eight hundred ninety-seven".