906623689 has 2 divisors, whose sum is σ = 906623690. Its totient is φ = 906623688.

The previous prime is 906623659. The next prime is 906623701. The reversal of 906623689 is 986326609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 735223225 + 171400464 = 27115^2 + 13092^2 .

It is an emirp because it is prime and its reverse (986326609) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 906623689 - 2⁵ = 906623657 is a prime.

It is not a weakly prime, because it can be changed into another prime (906623659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 453311844 + 453311845.

It is an arithmetic number, because the mean of its divisors is an integer number (453311845).

Almost surely, 2^906623689 is an apocalyptic number.

It is an amenable number.

906623689 is a deficient number, since it is larger than the sum of its proper divisors (1).

906623689 is an equidigital number, since it uses as much as digits as its factorization.

906623689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 49.

The square root of 906623689 is about 30110.1924437557. The cubic root of 906623689 is about 967.8521537428.

The spelling of 906623689 in words is "nine hundred six million, six hundred twenty-three thousand, six hundred eighty-nine".