30123109 has 2 divisors, whose sum is σ = 30123110. Its totient is φ = 30123108.

The previous prime is 30123097. The next prime is 30123139. The reversal of 30123109 is 90132103.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27531009 + 2592100 = 5247^2 + 1610^2 .

It is an emirp because it is prime and its reverse (90132103) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30123109 - 2¹⁷ = 29992037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30123139) 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 as a sum of consecutive naturals, namely, 15061554 + 15061555.

It is an arithmetic number, because the mean of its divisors is an integer number (15061555).

Almost surely, 2^30123109 is an apocalyptic number.

It is an amenable number.

30123109 is a deficient number, since it is larger than the sum of its proper divisors (1).

30123109 is an equidigital number, since it uses as much as digits as its factorization.

30123109 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 30123109 is about 5488.4523319420. The cubic root of 30123109 is about 311.1477019557.

The spelling of 30123109 in words is "thirty million, one hundred twenty-three thousand, one hundred nine".