800861031 has 6 divisors (see below), whose sum is σ = 1156799280. Its totient is φ = 533907348.

The previous prime is 800861021. The next prime is 800861053. The reversal of 800861031 is 130168008.

It is not a de Polignac number, because 800861031 - 2⁷ = 800860903 is a prime.

It is a super-2 number, since 2×800861031² = 1282756781948765922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 800860986 and 800861004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800861021) 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 5 ways as a sum of consecutive naturals, for example, 44492271 + ... + 44492288.

It is an arithmetic number, because the mean of its divisors is an integer number (192799880).

Almost surely, 2^800861031 is an apocalyptic number.

800861031 is a deficient number, since it is larger than the sum of its proper divisors (355938249).

800861031 is a wasteful number, since it uses less digits than its factorization.

800861031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88984565 (or 88984562 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 800861031 is about 28299.4881755837. The cubic root of 800861031 is about 928.6506932990.

The spelling of 800861031 in words is "eight hundred million, eight hundred sixty-one thousand, thirty-one".