873661 has 4 divisors (see below), whose sum is σ = 884800. Its totient is φ = 862524.

The previous prime is 873659. The next prime is 873667. The reversal of 873661 is 166378.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 873661 - 2¹ = 873659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5451 + ... + 5608.

It is an arithmetic number, because the mean of its divisors is an integer number (221200).

2⁸⁷³⁶⁶¹ is an apocalyptic number.

It is an amenable number.

873661 is a deficient number, since it is larger than the sum of its proper divisors (11139).

873661 is a wasteful number, since it uses less digits than its factorization.

873661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11138.

The product of its digits is 6048, while the sum is 31.

The square root of 873661 is about 934.6983470618. The cubic root of 873661 is about 95.5977453761.

The spelling of 873661 in words is "eight hundred seventy-three thousand, six hundred sixty-one".