653679 has 24 divisors (see below), whose sum is σ = 1051232. Its totient is φ = 388800.

The previous prime is 653659. The next prime is 653687. The reversal of 653679 is 976356.

It is a happy number.

It is not a de Polignac number, because 653679 - 2⁵ = 653647 is a prime.

653679 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 653679.

It is not an unprimeable number, because it can be changed into a prime (653659) 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, 4254 + ... + 4404.

2⁶⁵³⁶⁷⁹ is an apocalyptic number.

653679 is a deficient number, since it is larger than the sum of its proper divisors (397553).

653679 is a wasteful number, since it uses less digits than its factorization.

653679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 204 counting only the distinct ones).

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

The square root of 653679 is about 808.5041743863. The cubic root of 653679 is about 86.7870336058.

The spelling of 653679 in words is "six hundred fifty-three thousand, six hundred seventy-nine".