891423 has 24 divisors (see below), whose sum is σ = 1463280. Its totient is φ = 518400.

The previous prime is 891421. The next prime is 891427. The reversal of 891423 is 324198.

It is not a de Polignac number, because 891423 - 2¹ = 891421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891421) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2023 + ... + 2423.

It is an arithmetic number, because the mean of its divisors is an integer number (60970).

2⁸⁹¹⁴²³ is an apocalyptic number.

891423 is a deficient number, since it is larger than the sum of its proper divisors (571857).

891423 is a wasteful number, since it uses less digits than its factorization.

891423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439 (or 436 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 891423 is about 944.1520004745. The cubic root of 891423 is about 96.2412551790.

The spelling of 891423 in words is "eight hundred ninety-one thousand, four hundred twenty-three".