906981 has 8 divisors (see below), whose sum is σ = 1242144. Its totient is φ = 588240.

The previous prime is 906973. The next prime is 907019. The reversal of 906981 is 189609.

It is a happy number.

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

It is not a de Polignac number, because 906981 - 2³ = 906973 is a prime.

It is a super-2 number, since 2×906981² = 1645229068722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (906901) 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 7 ways as a sum of consecutive naturals, for example, 3975 + ... + 4196.

It is an arithmetic number, because the mean of its divisors is an integer number (155268).

2⁹⁰⁶⁹⁸¹ is an apocalyptic number.

It is an amenable number.

906981 is a deficient number, since it is larger than the sum of its proper divisors (335163).

906981 is a wasteful number, since it uses less digits than its factorization.

906981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8211.

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 906981 is about 952.3555008504. The cubic root of 906981 is about 96.7979284328.

The spelling of 906981 in words is "nine hundred six thousand, nine hundred eighty-one".