891489 has 8 divisors (see below), whose sum is σ = 1229760. Its totient is φ = 573776.

The previous prime is 891487. The next prime is 891491. The reversal of 891489 is 984198.

891489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (891487) and next prime (891491).

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 891489 - 2¹ = 891487 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 891489.

It is not an unprimeable number, because it can be changed into a prime (891481) 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, 5037 + ... + 5210.

It is an arithmetic number, because the mean of its divisors is an integer number (153720).

2⁸⁹¹⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

891489 is a deficient number, since it is larger than the sum of its proper divisors (338271).

891489 is a wasteful number, since it uses less digits than its factorization.

891489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10279.

The product of its digits is 20736, while the sum is 39.

The square root of 891489 is about 944.1869518268. The cubic root of 891489 is about 96.2436303200.

The spelling of 891489 in words is "eight hundred ninety-one thousand, four hundred eighty-nine".