679624987 has 4 divisors (see below), whose sum is σ = 684813096. Its totient is φ = 674436880.

The previous prime is 679624961. The next prime is 679625021. The reversal of 679624987 is 789426976.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 679624987 - 2¹¹ = 679622939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679622987) 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, 2593858 + ... + 2594119.

It is an arithmetic number, because the mean of its divisors is an integer number (171203274).

Almost surely, 2^679624987 is an apocalyptic number.

679624987 is a deficient number, since it is larger than the sum of its proper divisors (5188109).

679624987 is a wasteful number, since it uses less digits than its factorization.

679624987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5188108.

The product of its digits is 9144576, while the sum is 58.

The square root of 679624987 is about 26069.6180831250. The cubic root of 679624987 is about 879.2042509522.

The spelling of 679624987 in words is "six hundred seventy-nine million, six hundred twenty-four thousand, nine hundred eighty-seven".