800691 has 4 divisors (see below), whose sum is σ = 1067592. Its totient is φ = 533792.

The previous prime is 800687. The next prime is 800693. The reversal of 800691 is 196008.

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

It is a cyclic number.

It is not a de Polignac number, because 800691 - 2² = 800687 is a prime.

It is a super-2 number, since 2×800691² = 1282212154962, which contains 22 as substring.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 800691.

It is not an unprimeable number, because it can be changed into a prime (800693) 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, 133446 + ... + 133451.

It is an arithmetic number, because the mean of its divisors is an integer number (266898).

2⁸⁰⁰⁶⁹¹ is an apocalyptic number.

800691 is a deficient number, since it is larger than the sum of its proper divisors (266901).

800691 is a wasteful number, since it uses less digits than its factorization.

800691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266900.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 800691 is about 894.8133883665. The cubic root of 800691 is about 92.8584967963.

Adding to 800691 its reverse (196008), we get a palindrome (996699).

The spelling of 800691 in words is "eight hundred thousand, six hundred ninety-one".