102017309 has 2 divisors, whose sum is σ = 102017310. Its totient is φ = 102017308.

The previous prime is 102017303. The next prime is 102017317. The reversal of 102017309 is 903710201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78765625 + 23251684 = 8875^2 + 4822^2 .

It is a cyclic number.

It is not a de Polignac number, because 102017309 - 2²⁰ = 100968733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102017303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51008654 + 51008655.

It is an arithmetic number, because the mean of its divisors is an integer number (51008655).

Almost surely, 2^102017309 is an apocalyptic number.

It is an amenable number.

102017309 is a deficient number, since it is larger than the sum of its proper divisors (1).

102017309 is an equidigital number, since it uses as much as digits as its factorization.

102017309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 102017309 is about 10100.3618252021. The cubic root of 102017309 is about 467.2593005361.

The spelling of 102017309 in words is "one hundred two million, seventeen thousand, three hundred nine".