867000891 has 4 divisors (see below), whose sum is σ = 1156001192. Its totient is φ = 578000592.

The previous prime is 867000881. The next prime is 867000931. The reversal of 867000891 is 198000768.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 867000891 - 2⁷ = 867000763 is a prime.

It is a Duffinian number.

867000891 is a modest number, since divided by 891 gives 867 as remainder.

It is not an unprimeable number, because it can be changed into a prime (867000821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 144500146 + ... + 144500151.

It is an arithmetic number, because the mean of its divisors is an integer number (289000298).

Almost surely, 2^867000891 is an apocalyptic number.

867000891 is a deficient number, since it is larger than the sum of its proper divisors (289000301).

867000891 is a wasteful number, since it uses less digits than its factorization.

867000891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 289000300.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 867000891 is about 29444.8788586403. The cubic root of 867000891 is about 953.5420462420.

The spelling of 867000891 in words is "eight hundred sixty-seven million, eight hundred ninety-one", and thus it is an aban number.