800870013 has 12 divisors (see below), whose sum is σ = 1158529788. Its totient is φ = 533120640.

The previous prime is 800870009. The next prime is 800870023. The reversal of 800870013 is 310078008.

It can be written as a sum of positive squares in 2 ways, for example, as 538332804 + 262537209 = 23202^2 + 16203^2 .

It is not a de Polignac number, because 800870013 - 2² = 800870009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (800870023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59628 + ... + 71813.

It is an arithmetic number, because the mean of its divisors is an integer number (96544149).

Almost surely, 2^800870013 is an apocalyptic number.

It is an amenable number.

800870013 is a deficient number, since it is larger than the sum of its proper divisors (357659775).

800870013 is a wasteful number, since it uses less digits than its factorization.

800870013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132124 (or 132121 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 800870013 is about 28299.6468705883. The cubic root of 800870013 is about 928.6541650246.

The spelling of 800870013 in words is "eight hundred million, eight hundred seventy thousand, thirteen".