30102309 has 6 divisors (see below), whose sum is σ = 43481126. Its totient is φ = 20068200.

The previous prime is 30102299. The next prime is 30102329. The reversal of 30102309 is 90320103.

It can be written as a sum of positive squares in only one way, i.e., 25704900 + 4397409 = 5070^2 + 2097^2 .

It is not a de Polignac number, because 30102309 - 2⁵ = 30102277 is a prime.

It is a super-2 number, since 2×30102309² = 1812298014262962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30102291 and 30102300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30102329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1672342 + ... + 1672359.

Almost surely, 2^30102309 is an apocalyptic number.

It is an amenable number.

30102309 is a deficient number, since it is larger than the sum of its proper divisors (13378817).

30102309 is a wasteful number, since it uses less digits than its factorization.

30102309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3344707 (or 3344704 counting only the distinct ones).

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

The square root of 30102309 is about 5486.5571171728. The cubic root of 30102309 is about 311.0760696597.

The spelling of 30102309 in words is "thirty million, one hundred two thousand, three hundred nine".