30747139 has 2 divisors, whose sum is σ = 30747140. Its totient is φ = 30747138.

The previous prime is 30747103. The next prime is 30747173. The reversal of 30747139 is 93174703.

It is an a-pointer prime, because the next prime (30747173) can be obtained adding 30747139 to its sum of digits (34).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30747139 - 2⁹ = 30746627 is a prime.

It is not a weakly prime, because it can be changed into another prime (30747839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15373569 + 15373570.

It is an arithmetic number, because the mean of its divisors is an integer number (15373570).

Almost surely, 2^30747139 is an apocalyptic number.

30747139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30747139 is an equidigital number, since it uses as much as digits as its factorization.

30747139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 34.

The square root of 30747139 is about 5545.0102795216. The cubic root of 30747139 is about 313.2816112253.

The spelling of 30747139 in words is "thirty million, seven hundred forty-seven thousand, one hundred thirty-nine".