908891 has 8 divisors (see below), whose sum is σ = 971520. Its totient is φ = 848232.

The previous prime is 908881. The next prime is 908893. The reversal of 908891 is 198809.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-908891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (908893) 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, 530 + ... + 1448.

It is an arithmetic number, because the mean of its divisors is an integer number (121440).

2⁹⁰⁸⁸⁹¹ is an apocalyptic number.

908891 is a deficient number, since it is larger than the sum of its proper divisors (62629).

908891 is a wasteful number, since it uses less digits than its factorization.

908891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985.

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 908891 is about 953.3577502701. The cubic root of 908891 is about 96.8658293088.

The spelling of 908891 in words is "nine hundred eight thousand, eight hundred ninety-one".