800038891 has 2 divisors, whose sum is σ = 800038892. Its totient is φ = 800038890.

The previous prime is 800038861. The next prime is 800038907. The reversal of 800038891 is 198830008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 800038891 - 2⁵ = 800038859 is a prime.

It is a super-2 number, since 2×800038891² = 1280124454225019762, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 800038891.

It is not a weakly prime, because it can be changed into another prime (800038861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400019445 + 400019446.

It is an arithmetic number, because the mean of its divisors is an integer number (400019446).

Almost surely, 2^800038891 is an apocalyptic number.

800038891 is a deficient number, since it is larger than the sum of its proper divisors (1).

800038891 is an equidigital number, since it uses as much as digits as its factorization.

800038891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 800038891 is about 28284.9587413523. The cubic root of 800038891 is about 928.3328094814.

Adding to 800038891 its reverse (198830008), we get a palindrome (998868899).

The spelling of 800038891 in words is "eight hundred million, thirty-eight thousand, eight hundred ninety-one".