30939247 has 2 divisors, whose sum is σ = 30939248. Its totient is φ = 30939246.

The previous prime is 30939241. The next prime is 30939253. The reversal of 30939247 is 74293903.

It is a balanced prime because it is at equal distance from previous prime (30939241) and next prime (30939253).

It is a cyclic number.

It is not a de Polignac number, because 30939247 - 2⁷ = 30939119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30939241) 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, 15469623 + 15469624.

It is an arithmetic number, because the mean of its divisors is an integer number (15469624).

Almost surely, 2^30939247 is an apocalyptic number.

30939247 is a deficient number, since it is larger than the sum of its proper divisors (1).

30939247 is an equidigital number, since it uses as much as digits as its factorization.

30939247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 30939247 is about 5562.3059067261. The cubic root of 30939247 is about 313.9327178113.

The spelling of 30939247 in words is "thirty million, nine hundred thirty-nine thousand, two hundred forty-seven".