652912809 has 4 divisors (see below), whose sum is σ = 870550416. Its totient is φ = 435275204.

The previous prime is 652912781. The next prime is 652912837. The reversal of 652912809 is 908219256.

652912809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (652912781) and next prime (652912837).

It is a cyclic number.

It is not a de Polignac number, because 652912809 - 2¹¹ = 652910761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (652912859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108818799 + ... + 108818804.

It is an arithmetic number, because the mean of its divisors is an integer number (217637604).

Almost surely, 2^652912809 is an apocalyptic number.

It is an amenable number.

652912809 is a deficient number, since it is larger than the sum of its proper divisors (217637607).

652912809 is a wasteful number, since it uses less digits than its factorization.

652912809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217637606.

The product of its (nonzero) digits is 77760, while the sum is 42.

The square root of 652912809 is about 25552.1585976606. The cubic root of 652912809 is about 867.5311204221.

The spelling of 652912809 in words is "six hundred fifty-two million, nine hundred twelve thousand, eight hundred nine".