891149 has 8 divisors (see below), whose sum is σ = 1035648. Its totient is φ = 750960.

The previous prime is 891133. The next prime is 891151. The reversal of 891149 is 941198.

891149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 891149 - 2⁴ = 891133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891149.

It is not an unprimeable number, because it can be changed into a prime (891179) 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, 617 + ... + 1470.

It is an arithmetic number, because the mean of its divisors is an integer number (129456).

2⁸⁹¹¹⁴⁹ is an apocalyptic number.

It is an amenable number.

891149 is a deficient number, since it is larger than the sum of its proper divisors (144499).

891149 is a wasteful number, since it uses less digits than its factorization.

891149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155.

The product of its digits is 2592, while the sum is 32.

The square root of 891149 is about 944.0068855681. The cubic root of 891149 is about 96.2313934911.

The spelling of 891149 in words is "eight hundred ninety-one thousand, one hundred forty-nine".