823149 has 16 divisors (see below), whose sum is σ = 1249600. Its totient is φ = 535248.

The previous prime is 823129. The next prime is 823153. The reversal of 823149 is 941328.

It is not a de Polignac number, because 823149 - 2⁵ = 823117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823129) 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, 807 + ... + 1515.

It is an arithmetic number, because the mean of its divisors is an integer number (78100).

2⁸²³¹⁴⁹ is an apocalyptic number.

It is an amenable number.

823149 is a deficient number, since it is larger than the sum of its proper divisors (426451).

823149 is a wasteful number, since it uses less digits than its factorization.

823149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 755 counting only the distinct ones).

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

The square root of 823149 is about 907.2755920888. The cubic root of 823149 is about 93.7186775361.

The spelling of 823149 in words is "eight hundred twenty-three thousand, one hundred forty-nine".