30947117 has 2 divisors, whose sum is σ = 30947118. Its totient is φ = 30947116.

The previous prime is 30947113. The next prime is 30947149. The reversal of 30947117 is 71174903.

It is an a-pointer prime, because the next prime (30947149) can be obtained adding 30947117 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28026436 + 2920681 = 5294^2 + 1709^2 .

It is a cyclic number.

It is not a de Polignac number, because 30947117 - 2² = 30947113 is a prime.

It is a super-2 number, since 2×30947117² = 1915448101223378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30947113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15473558 + 15473559.

It is an arithmetic number, because the mean of its divisors is an integer number (15473559).

Almost surely, 2^30947117 is an apocalyptic number.

It is an amenable number.

30947117 is a deficient number, since it is larger than the sum of its proper divisors (1).

30947117 is an equidigital number, since it uses as much as digits as its factorization.

30947117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 30947117 is about 5563.0133021592. The cubic root of 30947117 is about 313.9593338548.

The spelling of 30947117 in words is "thirty million, nine hundred forty-seven thousand, one hundred seventeen".