679555 has 4 divisors (see below), whose sum is σ = 815472. Its totient is φ = 543640.

The previous prime is 679537. The next prime is 679561. The reversal of 679555 is 555976.

679555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a de Polignac number, because none of the positive numbers 2^k-679555 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67951 + ... + 67960.

It is an arithmetic number, because the mean of its divisors is an integer number (203868).

2⁶⁷⁹⁵⁵⁵ is an apocalyptic number.

679555 is a deficient number, since it is larger than the sum of its proper divisors (135917).

679555 is a wasteful number, since it uses less digits than its factorization.

679555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135916.

The product of its digits is 47250, while the sum is 37.

The square root of 679555 is about 824.3512600827. The cubic root of 679555 is about 87.9174070102.

The spelling of 679555 in words is "six hundred seventy-nine thousand, five hundred fifty-five".