891469 has 4 divisors (see below), whose sum is σ = 896796. Its totient is φ = 886144.

The previous prime is 891439. The next prime is 891481. The reversal of 891469 is 964198.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 964198 = 2 ⋅482099.

It can be written as a sum of positive squares in 2 ways, for example, as 702244 + 189225 = 838^2 + 435^2 .

It is a cyclic number.

It is not a de Polignac number, because 891469 - 2⁹ = 890957 is a prime.

It is a super-2 number, since 2×891469² = 1589433955922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2404 + ... + 2749.

It is an arithmetic number, because the mean of its divisors is an integer number (224199).

2⁸⁹¹⁴⁶⁹ is an apocalyptic number.

It is an amenable number.

891469 is a deficient number, since it is larger than the sum of its proper divisors (5327).

891469 is a wasteful number, since it uses less digits than its factorization.

891469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5326.

The product of its digits is 15552, while the sum is 37.

The square root of 891469 is about 944.1763606446. The cubic root of 891469 is about 96.2429105927.

The spelling of 891469 in words is "eight hundred ninety-one thousand, four hundred sixty-nine".