800669 has 2 divisors, whose sum is σ = 800670. Its totient is φ = 800668.

The previous prime is 800663. The next prime is 800677. The reversal of 800669 is 966008.

800669 is an esthetic number in base 7, because in such base its adjacent digits differ by 1.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 511225 + 289444 = 715^2 + 538^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800669 is a prime.

It is a super-3 number, since 3×800669³ = 1539856663337454927, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400334 + 400335.

It is an arithmetic number, because the mean of its divisors is an integer number (400335).

2⁸⁰⁰⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

800669 is a deficient number, since it is larger than the sum of its proper divisors (1).

800669 is an equidigital number, since it uses as much as digits as its factorization.

800669 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 800669 is about 894.8010952161. The cubic root of 800669 is about 92.8576463202.

The spelling of 800669 in words is "eight hundred thousand, six hundred sixty-nine".