679743687 has 16 divisors (see below), whose sum is σ = 1063795712. Its totient is φ = 377926560.

The previous prime is 679743671. The next prime is 679743697. The reversal of 679743687 is 786347976.

It is not a de Polignac number, because 679743687 - 2⁴ = 679743671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679743667) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436639 + ... + 438192.

It is an arithmetic number, because the mean of its divisors is an integer number (66487232).

Almost surely, 2^679743687 is an apocalyptic number.

679743687 is a deficient number, since it is larger than the sum of its proper divisors (384052025).

679743687 is a wasteful number, since it uses less digits than its factorization.

679743687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874878.

The product of its digits is 10668672, while the sum is 57.

The square root of 679743687 is about 26071.8945801796. The cubic root of 679743687 is about 879.2554338209.

The spelling of 679743687 in words is "six hundred seventy-nine million, seven hundred forty-three thousand, six hundred eighty-seven".