873551 has 4 divisors (see below), whose sum is σ = 998352. Its totient is φ = 748752.

The previous prime is 873541. The next prime is 873553. The reversal of 873551 is 155378.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155378 = 2 ⋅77689.

It is a cyclic number.

It is not a de Polignac number, because 873551 - 2¹⁴ = 857167 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 (873553) 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 3 ways as a sum of consecutive naturals, for example, 62390 + ... + 62403.

It is an arithmetic number, because the mean of its divisors is an integer number (249588).

2⁸⁷³⁵⁵¹ is an apocalyptic number.

873551 is a deficient number, since it is larger than the sum of its proper divisors (124801).

873551 is a wasteful number, since it uses less digits than its factorization.

873551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124800.

The product of its digits is 4200, while the sum is 29.

The square root of 873551 is about 934.6395026961. The cubic root of 873551 is about 95.5937330672.

The spelling of 873551 in words is "eight hundred seventy-three thousand, five hundred fifty-one".