30981047 has 2 divisors, whose sum is σ = 30981048. Its totient is φ = 30981046.

The previous prime is 30981031. The next prime is 30981073. The reversal of 30981047 is 74018903.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30981047 - 2⁴ = 30981031 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30986047) 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 as a sum of consecutive naturals, namely, 15490523 + 15490524.

It is an arithmetic number, because the mean of its divisors is an integer number (15490524).

Almost surely, 2^30981047 is an apocalyptic number.

30981047 is a deficient number, since it is larger than the sum of its proper divisors (1).

30981047 is an equidigital number, since it uses as much as digits as its factorization.

30981047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 30981047 is about 5566.0620729561. The cubic root of 30981047 is about 314.0740322011.

The spelling of 30981047 in words is "thirty million, nine hundred eighty-one thousand, forty-seven".