873691 has 8 divisors (see below), whose sum is σ = 1075424. Its totient is φ = 691200.

The previous prime is 873689. The next prime is 873707. The reversal of 873691 is 196378.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 10-Lehmer number, since φ(873691) divides (873691-1)¹⁰.

It is a cyclic number.

It is not a de Polignac number, because 873691 - 2¹ = 873689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (873641) 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, 4710 + ... + 4891.

It is an arithmetic number, because the mean of its divisors is an integer number (134428).

2⁸⁷³⁶⁹¹ is an apocalyptic number.

873691 is a deficient number, since it is larger than the sum of its proper divisors (201733).

873691 is a wasteful number, since it uses less digits than its factorization.

873691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9621.

The product of its digits is 9072, while the sum is 34.

The square root of 873691 is about 934.7143948822. The cubic root of 873691 is about 95.5988395837.

The spelling of 873691 in words is "eight hundred seventy-three thousand, six hundred ninety-one".