30685117 has 2 divisors, whose sum is σ = 30685118. Its totient is φ = 30685116.

The previous prime is 30685093. The next prime is 30685121. The reversal of 30685117 is 71158603.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28579716 + 2105401 = 5346^2 + 1451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30685117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30685217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15342558 + 15342559.

It is an arithmetic number, because the mean of its divisors is an integer number (15342559).

Almost surely, 2^30685117 is an apocalyptic number.

It is an amenable number.

30685117 is a deficient number, since it is larger than the sum of its proper divisors (1).

30685117 is an equidigital number, since it uses as much as digits as its factorization.

30685117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 30685117 is about 5539.4148607953. The cubic root of 30685117 is about 313.0708227084.

The spelling of 30685117 in words is "thirty million, six hundred eighty-five thousand, one hundred seventeen".