102130309 has 2 divisors, whose sum is σ = 102130310. Its totient is φ = 102130308.

The previous prime is 102130307. The next prime is 102130333. The reversal of 102130309 is 903031201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100942209 + 1188100 = 10047^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 102130309 - 2¹ = 102130307 is a prime.

Together with 102130307, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102130307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51065154 + 51065155.

It is an arithmetic number, because the mean of its divisors is an integer number (51065155).

Almost surely, 2^102130309 is an apocalyptic number.

It is an amenable number.

102130309 is a deficient number, since it is larger than the sum of its proper divisors (1).

102130309 is an equidigital number, since it uses as much as digits as its factorization.

102130309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 102130309 is about 10105.9541360527. The cubic root of 102130309 is about 467.4317576045.

The spelling of 102130309 in words is "one hundred two million, one hundred thirty thousand, three hundred nine".