52646309 has 2 divisors, whose sum is σ = 52646310. Its totient is φ = 52646308.

The previous prime is 52646303. The next prime is 52646317. The reversal of 52646309 is 90364625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36566209 + 16080100 = 6047^2 + 4010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52646309 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52646303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26323154 + 26323155.

It is an arithmetic number, because the mean of its divisors is an integer number (26323155).

Almost surely, 2^52646309 is an apocalyptic number.

It is an amenable number.

52646309 is a deficient number, since it is larger than the sum of its proper divisors (1).

52646309 is an equidigital number, since it uses as much as digits as its factorization.

52646309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 52646309 is about 7255.7776288969. Note that the first 3 decimals coincide. The cubic root of 52646309 is about 374.7911346519.

The spelling of 52646309 in words is "fifty-two million, six hundred forty-six thousand, three hundred nine".