30985417 has 2 divisors, whose sum is σ = 30985418. Its totient is φ = 30985416.

The previous prime is 30985411. The next prime is 30985421. The reversal of 30985417 is 71458903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30869136 + 116281 = 5556^2 + 341^2 .

It is a cyclic number.

It is not a de Polignac number, because 30985417 - 2²³ = 22596809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (30985411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15492708 + 15492709.

It is an arithmetic number, because the mean of its divisors is an integer number (15492709).

Almost surely, 2^30985417 is an apocalyptic number.

It is an amenable number.

30985417 is a deficient number, since it is larger than the sum of its proper divisors (1).

30985417 is an equidigital number, since it uses as much as digits as its factorization.

30985417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 30985417 is about 5566.4546167197. The cubic root of 30985417 is about 314.0887986377.

It can be divided in two parts, 3098 and 5417, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 30985417 in words is "thirty million, nine hundred eighty-five thousand, four hundred seventeen".