891806114887 has 4 divisors (see below), whose sum is σ = 893006393040. Its totient is φ = 890605836736.

The previous prime is 891806114851. The next prime is 891806114891. The reversal of 891806114887 is 788411608198.

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

It is a cyclic number.

It is not a de Polignac number, because 891806114887 - 2²³ = 891797726279 is a prime.

It is a super-3 number, since 3×891806114887³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891806114807) 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, 600137962 + ... + 600139447.

It is an arithmetic number, because the mean of its divisors is an integer number (223251598260).

Almost surely, 2^891806114887 is an apocalyptic number.

891806114887 is a deficient number, since it is larger than the sum of its proper divisors (1200278153).

891806114887 is a wasteful number, since it uses less digits than its factorization.

891806114887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200278152.

The product of its (nonzero) digits is 6193152, while the sum is 61.

The spelling of 891806114887 in words is "eight hundred ninety-one billion, eight hundred six million, one hundred fourteen thousand, eight hundred eighty-seven".