679289 has 4 divisors (see below), whose sum is σ = 731556. Its totient is φ = 627024.

The previous prime is 679279. The next prime is 679297. The reversal of 679289 is 982976.

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

It can be written as a sum of positive squares in 2 ways, for example, as 153664 + 525625 = 392^2 + 725^2 .

It is a cyclic number.

It is not a de Polignac number, because 679289 - 2⁸ = 679033 is a prime.

It is a super-2 number, since 2×679289² = 922867091042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (679219) 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, 26114 + ... + 26139.

It is an arithmetic number, because the mean of its divisors is an integer number (182889).

2⁶⁷⁹²⁸⁹ is an apocalyptic number.

It is an amenable number.

679289 is a deficient number, since it is larger than the sum of its proper divisors (52267).

679289 is a wasteful number, since it uses less digits than its factorization.

679289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52266.

The product of its digits is 54432, while the sum is 41.

The square root of 679289 is about 824.1899053010. The cubic root of 679289 is about 87.9059342659.

The spelling of 679289 in words is "six hundred seventy-nine thousand, two hundred eighty-nine".