679653 has 24 divisors (see below), whose sum is σ = 1092728. Its totient is φ = 404352.

The previous prime is 679639. The next prime is 679669. The reversal of 679653 is 356976.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 66564 + 613089 = 258^2 + 783^2 .

It is not a de Polignac number, because 679653 - 2¹⁴ = 663269 is a prime.

Its product of digits (34020) is a multiple of the sum of its prime divisors (210).

It is a Curzon number.

679653 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (679603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4251 + ... + 4407.

2⁶⁷⁹⁶⁵³ is an apocalyptic number.

It is an amenable number.

679653 is a deficient number, since it is larger than the sum of its proper divisors (413075).

679653 is a wasteful number, since it uses less digits than its factorization.

679653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 210 counting only the distinct ones).

The product of its digits is 34020, while the sum is 36.

The square root of 679653 is about 824.4106986205. The cubic root of 679653 is about 87.9216330560.

The spelling of 679653 in words is "six hundred seventy-nine thousand, six hundred fifty-three".