30331139 has 2 divisors, whose sum is σ = 30331140. Its totient is φ = 30331138.

The previous prime is 30331123. The next prime is 30331141. The reversal of 30331139 is 93113303.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30331139 - 2⁴ = 30331123 is a prime.

Together with 30331141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30331109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15165569 + 15165570.

It is an arithmetic number, because the mean of its divisors is an integer number (15165570).

Almost surely, 2^30331139 is an apocalyptic number.

30331139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30331139 is an equidigital number, since it uses as much as digits as its factorization.

30331139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 729, while the sum is 23.

The square root of 30331139 is about 5507.3713330408. The cubic root of 30331139 is about 311.8623207737.

The spelling of 30331139 in words is "thirty million, three hundred thirty-one thousand, one hundred thirty-nine".