102030309 has 12 divisors (see below), whose sum is σ = 148439200. Its totient is φ = 67530024.

The previous prime is 102030307. The next prime is 102030319. The reversal of 102030309 is 903030201.

It is not a de Polignac number, because 102030309 - 2¹ = 102030307 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102030291 and 102030300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102030307) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39529 + ... + 42030.

Almost surely, 2^102030309 is an apocalyptic number.

It is an amenable number.

102030309 is a deficient number, since it is larger than the sum of its proper divisors (46408891).

102030309 is a wasteful number, since it uses less digits than its factorization.

102030309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81704 (or 81701 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 102030309 is about 10101.0053460039. The cubic root of 102030309 is about 467.2791472104.

It can be divided in two parts, 1020 and 30309, that added together give a square (31329 = 177²).

The spelling of 102030309 in words is "one hundred two million, thirty thousand, three hundred nine".