906685889 has 2 divisors, whose sum is σ = 906685890. Its totient is φ = 906685888.

The previous prime is 906685853. The next prime is 906685891. The reversal of 906685889 is 988586609.

906685889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 886074289 + 20611600 = 29767^2 + 4540^2 .

It is a cyclic number.

It is not a de Polignac number, because 906685889 - 2¹² = 906681793 is a prime.

Together with 906685891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (906685189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453342944 + 453342945.

It is an arithmetic number, because the mean of its divisors is an integer number (453342945).

Almost surely, 2^906685889 is an apocalyptic number.

It is an amenable number.

906685889 is a deficient number, since it is larger than the sum of its proper divisors (1).

906685889 is an equidigital number, since it uses as much as digits as its factorization.

906685889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 59.

The square root of 906685889 is about 30111.2252988815. The cubic root of 906685889 is about 967.8742867873.

The spelling of 906685889 in words is "nine hundred six million, six hundred eighty-five thousand, eight hundred eighty-nine".