823949 has 8 divisors (see below), whose sum is σ = 972288. Its totient is φ = 683280.

The previous prime is 823913. The next prime is 823961. The reversal of 823949 is 949328.

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 823949 - 2¹² = 819853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823969) 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, 1682 + ... + 2115.

It is an arithmetic number, because the mean of its divisors is an integer number (121536).

2⁸²³⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

823949 is a deficient number, since it is larger than the sum of its proper divisors (148339).

823949 is a wasteful number, since it uses less digits than its factorization.

823949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835.

The product of its digits is 15552, while the sum is 35.

The square root of 823949 is about 907.7163653917. The cubic root of 823949 is about 93.7490287307.

Multiplying 823949 by its sum of digits (35), we get a triangular number (28838215 = T₇₅₉₄).

The spelling of 823949 in words is "eight hundred twenty-three thousand, nine hundred forty-nine".