102245309 has 2 divisors, whose sum is σ = 102245310. Its totient is φ = 102245308.

The previous prime is 102245263. The next prime is 102245371. The reversal of 102245309 is 903542201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90535225 + 11710084 = 9515^2 + 3422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102245309 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 (102245389) 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, 51122654 + 51122655.

It is an arithmetic number, because the mean of its divisors is an integer number (51122655).

Almost surely, 2^102245309 is an apocalyptic number.

It is an amenable number.

102245309 is a deficient number, since it is larger than the sum of its proper divisors (1).

102245309 is an equidigital number, since it uses as much as digits as its factorization.

102245309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 102245309 is about 10111.6422503963. The cubic root of 102245309 is about 467.6071364551.

The spelling of 102245309 in words is "one hundred two million, two hundred forty-five thousand, three hundred nine".