906685189 has 2 divisors, whose sum is σ = 906685190. Its totient is φ = 906685188.

The previous prime is 906685183. The next prime is 906685237. The reversal of 906685189 is 981586609.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 878648164 + 28037025 = 29642^2 + 5295^2 .

It is an emirp because it is prime and its reverse (981586609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 906685189 - 2⁷ = 906685061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (906685183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453342594 + 453342595.

It is an arithmetic number, because the mean of its divisors is an integer number (453342595).

Almost surely, 2^906685189 is an apocalyptic number.

It is an amenable number.

906685189 is a deficient number, since it is larger than the sum of its proper divisors (1).

906685189 is an equidigital number, since it uses as much as digits as its factorization.

906685189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 933120, while the sum is 52.

The square root of 906685189 is about 30111.2136753071. The cubic root of 906685189 is about 967.8740377072.

The spelling of 906685189 in words is "nine hundred six million, six hundred eighty-five thousand, one hundred eighty-nine".