679654 has 4 divisors (see below), whose sum is σ = 1019484. Its totient is φ = 339826.

The previous prime is 679639. The next prime is 679669. The reversal of 679654 is 456976.

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

It is an interprime number because it is at equal distance from previous prime (679639) and next prime (679669).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169912 + ... + 169915.

It is an arithmetic number, because the mean of its divisors is an integer number (254871).

2⁶⁷⁹⁶⁵⁴ is an apocalyptic number.

679654 is a deficient number, since it is larger than the sum of its proper divisors (339830).

679654 is a wasteful number, since it uses less digits than its factorization.

679654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 339829.

The product of its digits is 45360, while the sum is 37.

The square root of 679654 is about 824.4113051141. The cubic root of 679654 is about 87.9216761768.

The spelling of 679654 in words is "six hundred seventy-nine thousand, six hundred fifty-four".