800872389 has 12 divisors (see below), whose sum is σ = 1157061100. Its totient is φ = 533801664.

The previous prime is 800872379. The next prime is 800872399. The reversal of 800872389 is 983278008.

It is an interprime number because it is at equal distance from previous prime (800872379) and next prime (800872399).

It can be written as a sum of positive squares in 2 ways, for example, as 173369889 + 627502500 = 13167^2 + 25050^2 .

It is not a de Polignac number, because 800872389 - 2²⁹ = 264001477 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 (800872309) 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 11 ways as a sum of consecutive naturals, for example, 77097 + ... + 86865.

Almost surely, 2^800872389 is an apocalyptic number.

It is an amenable number.

800872389 is a deficient number, since it is larger than the sum of its proper divisors (356188711).

800872389 is a wasteful number, since it uses less digits than its factorization.

800872389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18884 (or 18881 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 800872389 is about 28299.6888498796. The cubic root of 800872389 is about 928.6550833926.

The spelling of 800872389 in words is "eight hundred million, eight hundred seventy-two thousand, three hundred eighty-nine".