867791 has 4 divisors (see below), whose sum is σ = 874752. Its totient is φ = 860832.

The previous prime is 867781. The next prime is 867793. The reversal of 867791 is 197768.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-867791 is a prime.

It is a super-2 number, since 2×867791² = 1506122439362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867793) 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, 3290 + ... + 3543.

It is an arithmetic number, because the mean of its divisors is an integer number (218688).

2⁸⁶⁷⁷⁹¹ is an apocalyptic number.

867791 is a deficient number, since it is larger than the sum of its proper divisors (6961).

867791 is a wasteful number, since it uses less digits than its factorization.

867791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6960.

The product of its digits is 21168, while the sum is 38.

The square root of 867791 is about 931.5530043964. The cubic root of 867791 is about 95.3831616651.

The spelling of 867791 in words is "eight hundred sixty-seven thousand, seven hundred ninety-one".