653634 has 12 divisors (see below), whose sum is σ = 1416246. Its totient is φ = 217872.

The previous prime is 653623. The next prime is 653641. The reversal of 653634 is 436356.

653634 is a `hidden beast` number, since 653 + 6 + 3 + 4 = 666.

653634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 632025 + 21609 = 795^2 + 147^2 .

It is a junction number, because it is equal to n+sod(n) for n = 653598 and 653607.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 653634.

It is an unprimeable number.

653634 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18139 + ... + 18174.

2⁶⁵³⁶³⁴ is an apocalyptic number.

653634 is an abundant number, since it is smaller than the sum of its proper divisors (762612).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

653634 is a wasteful number, since it uses less digits than its factorization.

653634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36321 (or 36318 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 653634 is about 808.4763447374. The cubic root of 653634 is about 86.7850420543.

The spelling of 653634 in words is "six hundred fifty-three thousand, six hundred thirty-four".