679209112491 has 48 divisors (see below), whose sum is σ = 1173624026400. Its totient is φ = 345910182912.

The previous prime is 679209112489. The next prime is 679209112493. The reversal of 679209112491 is 194211902976.

It is an interprime number because it is at equal distance from previous prime (679209112489) and next prime (679209112493).

It is not a de Polignac number, because 679209112491 - 2¹ = 679209112489 is a prime.

It is a super-2 number, since 2×679209112491² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (679209112493) 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 47 ways as a sum of consecutive naturals, for example, 6072526 + ... + 6183363.

It is an arithmetic number, because the mean of its divisors is an integer number (24450500550).

Almost surely, 2^679209112491 is an apocalyptic number.

679209112491 is a deficient number, since it is larger than the sum of its proper divisors (494414913909).

679209112491 is a wasteful number, since it uses less digits than its factorization.

679209112491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12255948 (or 12255941 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The spelling of 679209112491 in words is "six hundred seventy-nine billion, two hundred nine million, one hundred twelve thousand, four hundred ninety-one".