653472689 has 4 divisors (see below), whose sum is σ = 676006260. Its totient is φ = 630939120.

The previous prime is 653472667. The next prime is 653472691. The reversal of 653472689 is 986274356.

It is a happy number.

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 554131600 + 99341089 = 23540^2 + 9967^2 .

It is a cyclic number.

It is not a de Polignac number, because 653472689 - 2²⁴ = 636695473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653472629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11266742 + ... + 11266799.

It is an arithmetic number, because the mean of its divisors is an integer number (169001565).

Almost surely, 2^653472689 is an apocalyptic number.

It is an amenable number.

653472689 is a deficient number, since it is larger than the sum of its proper divisors (22533571).

653472689 is a wasteful number, since it uses less digits than its factorization.

653472689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22533570.

The product of its digits is 2177280, while the sum is 50.

The square root of 653472689 is about 25563.1118802074. Note that the first 3 decimals coincide. The cubic root of 653472689 is about 867.7790221063.

The spelling of 653472689 in words is "six hundred fifty-three million, four hundred seventy-two thousand, six hundred eighty-nine".