30947149 has 2 divisors, whose sum is σ = 30947150. Its totient is φ = 30947148.

The previous prime is 30947117. The next prime is 30947153. The reversal of 30947149 is 94174903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27405225 + 3541924 = 5235^2 + 1882^2 .

It is a cyclic number.

It is not a de Polignac number, because 30947149 - 2⁵ = 30947117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30947179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15473574 + 15473575.

It is an arithmetic number, because the mean of its divisors is an integer number (15473575).

Almost surely, 2^30947149 is an apocalyptic number.

It is an amenable number.

30947149 is a deficient number, since it is larger than the sum of its proper divisors (1).

30947149 is an equidigital number, since it uses as much as digits as its factorization.

30947149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 30947149 is about 5563.0161782975. The cubic root of 30947149 is about 313.9594420684.

The spelling of 30947149 in words is "thirty million, nine hundred forty-seven thousand, one hundred forty-nine".