679634 has 4 divisors (see below), whose sum is σ = 1019454. Its totient is φ = 339816.

The previous prime is 679633. The next prime is 679639. The reversal of 679634 is 436976.

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

It can be written as a sum of positive squares in only one way, i.e., 555025 + 124609 = 745^2 + 353^2 .

It is a junction number, because it is equal to n+sod(n) for n = 679594 and 679603.

It is not an unprimeable number, because it can be changed into a prime (679633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169907 + ... + 169910.

2⁶⁷⁹⁶³⁴ is an apocalyptic number.

679634 is a deficient number, since it is larger than the sum of its proper divisors (339820).

679634 is a wasteful number, since it uses less digits than its factorization.

679634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339819.

The product of its digits is 27216, while the sum is 35.

The square root of 679634 is about 824.3991751573. The cubic root of 679634 is about 87.9208137524.

The spelling of 679634 in words is "six hundred seventy-nine thousand, six hundred thirty-four".