102308321 has 2 divisors, whose sum is σ = 102308322. Its totient is φ = 102308320.

The previous prime is 102308281. The next prime is 102308341. The reversal of 102308321 is 123803201.

It is an a-pointer prime, because the next prime (102308341) can be obtained adding 102308321 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98227921 + 4080400 = 9911^2 + 2020^2 .

It is a cyclic number.

It is not a de Polignac number, because 102308321 - 2⁶ = 102308257 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 102308293 and 102308302.

It is not a weakly prime, because it can be changed into another prime (102308341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51154160 + 51154161.

It is an arithmetic number, because the mean of its divisors is an integer number (51154161).

Almost surely, 2^102308321 is an apocalyptic number.

It is an amenable number.

102308321 is a deficient number, since it is larger than the sum of its proper divisors (1).

102308321 is an equidigital number, since it uses as much as digits as its factorization.

102308321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 102308321 is about 10114.7575848361. The cubic root of 102308321 is about 467.7031761018.

The spelling of 102308321 in words is "one hundred two million, three hundred eight thousand, three hundred twenty-one".