800038861 has 2 divisors, whose sum is σ = 800038862. Its totient is φ = 800038860.

The previous prime is 800038859. The next prime is 800038891. The reversal of 800038861 is 168830008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 799136361 + 902500 = 28269^2 + 950^2 .

It is a cyclic number.

It is not a de Polignac number, because 800038861 - 2¹ = 800038859 is a prime.

It is a super-2 number, since 2×800038861² = 1280124358220354642, which contains 22 as substring.

Together with 800038859, it forms a pair of twin primes.

It is equal to p_41148097 and since 800038861 and 41148097 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800038891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400019430 + 400019431.

It is an arithmetic number, because the mean of its divisors is an integer number (400019431).

Almost surely, 2^800038861 is an apocalyptic number.

It is an amenable number.

800038861 is a deficient number, since it is larger than the sum of its proper divisors (1).

800038861 is an equidigital number, since it uses as much as digits as its factorization.

800038861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 800038861 is about 28284.9582110351. The cubic root of 800038861 is about 928.3327978778.

Adding to 800038861 its reverse (168830008), we get a palindrome (968868869).

The spelling of 800038861 in words is "eight hundred million, thirty-eight thousand, eight hundred sixty-one".