823143 has 16 divisors (see below), whose sum is σ = 1161216. Its totient is φ = 517920.

The previous prime is 823129. The next prime is 823153. The reversal of 823143 is 341328.

It is a happy number.

It is not a de Polignac number, because 823143 - 2⁴ = 823127 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4846 + ... + 5012.

It is an arithmetic number, because the mean of its divisors is an integer number (72576).

2⁸²³¹⁴³ is an apocalyptic number.

823143 is a deficient number, since it is larger than the sum of its proper divisors (338073).

823143 is a wasteful number, since it uses less digits than its factorization.

823143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254.

The product of its digits is 576, while the sum is 21.

The square root of 823143 is about 907.2722854799. The cubic root of 823143 is about 93.7184498279.

The spelling of 823143 in words is "eight hundred twenty-three thousand, one hundred forty-three".