102331309 has 2 divisors, whose sum is σ = 102331310. Its totient is φ = 102331308.

The previous prime is 102331303. The next prime is 102331319. The reversal of 102331309 is 903133201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95844100 + 6487209 = 9790^2 + 2547^2 .

It is an emirp because it is prime and its reverse (903133201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102331309 - 2¹⁷ = 102200237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102331309.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102331303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51165654 + 51165655.

It is an arithmetic number, because the mean of its divisors is an integer number (51165655).

Almost surely, 2^102331309 is an apocalyptic number.

It is an amenable number.

102331309 is a deficient number, since it is larger than the sum of its proper divisors (1).

102331309 is an equidigital number, since it uses as much as digits as its factorization.

102331309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 102331309 is about 10115.8938804240. The cubic root of 102331309 is about 467.7382034105.

The spelling of 102331309 in words is "one hundred two million, three hundred thirty-one thousand, three hundred nine".