652965809 has 4 divisors (see below), whose sum is σ = 653212404. Its totient is φ = 652719216.

The previous prime is 652965787. The next prime is 652965839. The reversal of 652965809 is 908569256.

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 11458225 + 641507584 = 3385^2 + 25328^2 .

It is a cyclic number.

It is not a de Polignac number, because 652965809 - 2⁸ = 652965553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (652965839) 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 3 ways as a sum of consecutive naturals, for example, 119282 + ... + 124635.

It is an arithmetic number, because the mean of its divisors is an integer number (163303101).

Almost surely, 2^652965809 is an apocalyptic number.

It is an amenable number.

652965809 is a deficient number, since it is larger than the sum of its proper divisors (246595).

652965809 is a wasteful number, since it uses less digits than its factorization.

652965809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246594.

The product of its (nonzero) digits is 1166400, while the sum is 50.

The square root of 652965809 is about 25553.1956709919. The cubic root of 652965809 is about 867.5545936458.

The spelling of 652965809 in words is "six hundred fifty-two million, nine hundred sixty-five thousand, eight hundred nine".