906643 has 8 divisors (see below), whose sum is σ = 937440. Its totient is φ = 876480.

The previous prime is 906641. The next prime is 906649. The reversal of 906643 is 346609.

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

It is a cyclic number.

It is not a de Polignac number, because 906643 - 2¹ = 906641 is a prime.

It is an Ulam number.

It is a Duffinian number.

906643 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (906641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5346 + ... + 5512.

It is an arithmetic number, because the mean of its divisors is an integer number (117180).

2⁹⁰⁶⁶⁴³ is an apocalyptic number.

906643 is a deficient number, since it is larger than the sum of its proper divisors (30797).

906643 is a wasteful number, since it uses less digits than its factorization.

906643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 906643 is about 952.1780295722. The cubic root of 906643 is about 96.7859025414.

The spelling of 906643 in words is "nine hundred six thousand, six hundred forty-three".