873531 has 8 divisors (see below), whose sum is σ = 1294160. Its totient is φ = 582336.

The previous prime is 873529. The next prime is 873539. The reversal of 873531 is 135378.

It is not a de Polignac number, because 873531 - 2¹ = 873529 is a prime.

It is a super-2 number, since 2×873531² = 1526112815922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 32353 = 873531 / (8 + 7 + 3 + 5 + 3 + 1).

It is a Duffinian number.

873531 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 873495 and 873504.

It is not an unprimeable number, because it can be changed into a prime (873539) 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 7 ways as a sum of consecutive naturals, for example, 16150 + ... + 16203.

It is an arithmetic number, because the mean of its divisors is an integer number (161770).

2⁸⁷³⁵³¹ is an apocalyptic number.

873531 is a deficient number, since it is larger than the sum of its proper divisors (420629).

873531 is a wasteful number, since it uses less digits than its factorization.

873531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32362 (or 32356 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 873531 is about 934.6288033225. The cubic root of 873531 is about 95.5930035204.

The spelling of 873531 in words is "eight hundred seventy-three thousand, five hundred thirty-one".