875866891 has 4 divisors (see below), whose sum is σ = 875968912. Its totient is φ = 875764872.

The previous prime is 875866867. The next prime is 875866907. The reversal of 875866891 is 198668578.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 198668578 = 2 ⋅99334289.

It is a cyclic number.

It is not a de Polignac number, because 875866891 - 2⁷ = 875866763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (875866391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36816 + ... + 55741.

It is an arithmetic number, because the mean of its divisors is an integer number (218992228).

Almost surely, 2^875866891 is an apocalyptic number.

875866891 is a deficient number, since it is larger than the sum of its proper divisors (102021).

875866891 is an equidigital number, since it uses as much as digits as its factorization.

875866891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102020.

The product of its digits is 5806080, while the sum is 58.

The square root of 875866891 is about 29595.0484203017. The cubic root of 875866891 is about 956.7813543352.

The spelling of 875866891 in words is "eight hundred seventy-five million, eight hundred sixty-six thousand, eight hundred ninety-one".