906633989 has 8 divisors (see below), whose sum is σ = 941929560. Its totient is φ = 871607296.

The previous prime is 906633947. The next prime is 906633997. The reversal of 906633989 is 989336609.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 228916900 + 677717089 = 15130^2 + 26033^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 906633989 - 2⁸ = 906633733 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 906633989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906632989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60332 + ... + 73845.

It is an arithmetic number, because the mean of its divisors is an integer number (117741195).

Almost surely, 2^906633989 is an apocalyptic number.

It is an amenable number.

906633989 is a deficient number, since it is larger than the sum of its proper divisors (35295571).

906633989 is a wasteful number, since it uses less digits than its factorization.

906633989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134439.

The product of its (nonzero) digits is 1889568, while the sum is 53.

The square root of 906633989 is about 30110.3634816985. The cubic root of 906633989 is about 967.8558189310.

The spelling of 906633989 in words is "nine hundred six million, six hundred thirty-three thousand, nine hundred eighty-nine".