800006391 has 18 divisors (see below), whose sum is σ = 1184459120. Its totient is φ = 520319520.

The previous prime is 800006387. The next prime is 800006393. The reversal of 800006391 is 193600008.

It is not a de Polignac number, because 800006391 - 2² = 800006387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800006393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11311 + ... + 41568.

Almost surely, 2^800006391 is an apocalyptic number.

800006391 is a deficient number, since it is larger than the sum of its proper divisors (384452729).

800006391 is a wasteful number, since it uses less digits than its factorization.

800006391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52967 (or 52923 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 800006391 is about 28284.3842252222. The cubic root of 800006391 is about 928.3202387488.

Adding to 800006391 its reverse (193600008), we get a palindrome (993606399).

The spelling of 800006391 in words is "eight hundred million, six thousand, three hundred ninety-one".