653552509 has 8 divisors (see below), whose sum is σ = 674938368. Its totient is φ = 632185680.

The previous prime is 653552503. The next prime is 653552533. The reversal of 653552509 is 905255356.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 653552509 - 2⁵ = 653552477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (653552503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107304 + ... + 113230.

It is an arithmetic number, because the mean of its divisors is an integer number (84367296).

Almost surely, 2^653552509 is an apocalyptic number.

It is an amenable number.

653552509 is a deficient number, since it is larger than the sum of its proper divisors (21385859).

653552509 is a wasteful number, since it uses less digits than its factorization.

653552509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9515.

The product of its (nonzero) digits is 202500, while the sum is 40.

The square root of 653552509 is about 25564.6730665581. The cubic root of 653552509 is about 867.8143529894.

The spelling of 653552509 in words is "six hundred fifty-three million, five hundred fifty-two thousand, five hundred nine".