891897 has 8 divisors (see below), whose sum is σ = 1195680. Its totient is φ = 591360.

The previous prime is 891893. The next prime is 891899. The reversal of 891897 is 798198.

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

It is not a de Polignac number, because 891897 - 2² = 891893 is a prime.

It is not an unprimeable number, because it can be changed into a prime (891893) 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, 72 + ... + 1337.

It is an arithmetic number, because the mean of its divisors is an integer number (149460).

2⁸⁹¹⁸⁹⁷ is an apocalyptic number.

It is an amenable number.

891897 is a deficient number, since it is larger than the sum of its proper divisors (303783).

891897 is a wasteful number, since it uses less digits than its factorization.

891897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1623.

The product of its digits is 36288, while the sum is 42.

The square root of 891897 is about 944.4029860182. The cubic root of 891897 is about 96.2583104085.

The spelling of 891897 in words is "eight hundred ninety-one thousand, eight hundred ninety-seven".