10891887 has 4 divisors (see below), whose sum is σ = 14522520. Its totient is φ = 7261256.

The previous prime is 10891879. The next prime is 10891889. The reversal of 10891887 is 78819801.

10891887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 10891887 - 2³ = 10891879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10891889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1815312 + ... + 1815317.

It is an arithmetic number, because the mean of its divisors is an integer number (3630630).

Almost surely, 2^10891887 is an apocalyptic number.

10891887 is a deficient number, since it is larger than the sum of its proper divisors (3630633).

10891887 is an equidigital number, since it uses as much as digits as its factorization.

10891887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3630632.

The product of its (nonzero) digits is 32256, while the sum is 42.

The square root of 10891887 is about 3300.2858967065. The cubic root of 10891887 is about 221.6669993274. Note that the first 3 decimals are identical.

The spelling of 10891887 in words is "ten million, eight hundred ninety-one thousand, eight hundred eighty-seven".