652542509 has 2 divisors, whose sum is σ = 652542510. Its totient is φ = 652542508.

The previous prime is 652542497. The next prime is 652542551. The reversal of 652542509 is 905245256.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490489609 + 162052900 = 22147^2 + 12730^2 .

It is a cyclic number.

It is not a de Polignac number, because 652542509 - 2⁴ = 652542493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (652544509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326271254 + 326271255.

It is an arithmetic number, because the mean of its divisors is an integer number (326271255).

Almost surely, 2^652542509 is an apocalyptic number.

It is an amenable number.

652542509 is a deficient number, since it is larger than the sum of its proper divisors (1).

652542509 is an equidigital number, since it uses as much as digits as its factorization.

652542509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 652542509 is about 25544.9116068152. The cubic root of 652542509 is about 867.3670824268.

The spelling of 652542509 in words is "six hundred fifty-two million, five hundred forty-two thousand, five hundred nine".