30665189 has 2 divisors, whose sum is σ = 30665190. Its totient is φ = 30665188.

The previous prime is 30665177. The next prime is 30665213. The reversal of 30665189 is 98156603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26604964 + 4060225 = 5158^2 + 2015^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30665189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30665389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15332594 + 15332595.

It is an arithmetic number, because the mean of its divisors is an integer number (15332595).

Almost surely, 2^30665189 is an apocalyptic number.

It is an amenable number.

30665189 is a deficient number, since it is larger than the sum of its proper divisors (1).

30665189 is an equidigital number, since it uses as much as digits as its factorization.

30665189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 30665189 is about 5537.6158227165. The cubic root of 30665189 is about 313.0030349442.

The spelling of 30665189 in words is "thirty million, six hundred sixty-five thousand, one hundred eighty-nine".