30927139 has 2 divisors, whose sum is σ = 30927140. Its totient is φ = 30927138.

The previous prime is 30927121. The next prime is 30927163. The reversal of 30927139 is 93172903.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30927139 - 2⁹ = 30926627 is a prime.

It is not a weakly prime, because it can be changed into another prime (30927179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15463569 + 15463570.

It is an arithmetic number, because the mean of its divisors is an integer number (15463570).

Almost surely, 2^30927139 is an apocalyptic number.

30927139 is a deficient number, since it is larger than the sum of its proper divisors (1).

30927139 is an equidigital number, since it uses as much as digits as its factorization.

30927139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 34.

The square root of 30927139 is about 5561.2174026916. The cubic root of 30927139 is about 313.8917601963.

The spelling of 30927139 in words is "thirty million, nine hundred twenty-seven thousand, one hundred thirty-nine".