30471247 has 2 divisors, whose sum is σ = 30471248. Its totient is φ = 30471246.

The previous prime is 30471229. The next prime is 30471253. The reversal of 30471247 is 74217403.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 30471247 - 2¹¹ = 30469199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30471227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15235623 + 15235624.

It is an arithmetic number, because the mean of its divisors is an integer number (15235624).

Almost surely, 2^30471247 is an apocalyptic number.

30471247 is a deficient number, since it is larger than the sum of its proper divisors (1).

30471247 is an equidigital number, since it uses as much as digits as its factorization.

30471247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 30471247 is about 5520.0767204813. The cubic root of 30471247 is about 312.3417763291.

The spelling of 30471247 in words is "thirty million, four hundred seventy-one thousand, two hundred forty-seven".