653897689 has 16 divisors (see below), whose sum is σ = 682463232. Its totient is φ = 626039568.

The previous prime is 653897683. The next prime is 653897701. The reversal of 653897689 is 986798356.

It is a cyclic number.

It is not a de Polignac number, because 653897689 - 2²⁵ = 620343257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653897683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 757272 + ... + 758134.

It is an arithmetic number, because the mean of its divisors is an integer number (42653952).

Almost surely, 2^653897689 is an apocalyptic number.

It is an amenable number.

653897689 is a deficient number, since it is larger than the sum of its proper divisors (28565543).

653897689 is a wasteful number, since it uses less digits than its factorization.

653897689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236.

The product of its digits is 19595520, while the sum is 61.

The square root of 653897689 is about 25571.4232885070. The cubic root of 653897689 is about 867.9671075794.

The spelling of 653897689 in words is "six hundred fifty-three million, eight hundred ninety-seven thousand, six hundred eighty-nine".