52640309 has 2 divisors, whose sum is σ = 52640310. Its totient is φ = 52640308.

The previous prime is 52640303. The next prime is 52640327. The reversal of 52640309 is 90304625.

52640309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52157284 + 483025 = 7222^2 + 695^2 .

It is a cyclic number.

It is not a de Polignac number, because 52640309 - 2⁴ = 52640293 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 (52640303) 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, 26320154 + 26320155.

It is an arithmetic number, because the mean of its divisors is an integer number (26320155).

Almost surely, 2^52640309 is an apocalyptic number.

It is an amenable number.

52640309 is a deficient number, since it is larger than the sum of its proper divisors (1).

52640309 is an equidigital number, since it uses as much as digits as its factorization.

52640309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 52640309 is about 7255.3641535074. The cubic root of 52640309 is about 374.7768960327.

The spelling of 52640309 in words is "fifty-two million, six hundred forty thousand, three hundred nine".