30138307 has 4 divisors (see below), whose sum is σ = 30150520. Its totient is φ = 30126096.

The previous prime is 30138289. The next prime is 30138359. The reversal of 30138307 is 70383103.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30138307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30138907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957 + ... + 7822.

It is an arithmetic number, because the mean of its divisors is an integer number (7537630).

Almost surely, 2^30138307 is an apocalyptic number.

30138307 is a deficient number, since it is larger than the sum of its proper divisors (12213).

30138307 is an equidigital number, since it uses as much as digits as its factorization.

30138307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12212.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 30138307 is about 5489.8367006679. The cubic root of 30138307 is about 311.2000208993.

The spelling of 30138307 in words is "thirty million, one hundred thirty-eight thousand, three hundred seven".