906809994 has 12 divisors (see below), whose sum is σ = 1964755026. Its totient is φ = 302269992.

The previous prime is 906809993. The next prime is 906810011. The reversal of 906809994 is 499908609.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 781929369 + 124880625 = 27963^2 + 11175^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 906809994.

It is not an unprimeable number, because it can be changed into a prime (906809993) 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 in 5 ways as a sum of consecutive naturals, for example, 25189149 + ... + 25189184.

Almost surely, 2^906809994 is an apocalyptic number.

906809994 is an abundant number, since it is smaller than the sum of its proper divisors (1057945032).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

906809994 is a wasteful number, since it uses less digits than its factorization.

906809994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50378341 (or 50378338 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 54.

The square root of 906809994 is about 30113.2860046857. The cubic root of 906809994 is about 967.9184448799.

The spelling of 906809994 in words is "nine hundred six million, eight hundred nine thousand, nine hundred ninety-four".