8897051991 has 8 divisors (see below), whose sum is σ = 11872330864. Its totient is φ = 5926570560.

The previous prime is 8897051959. The next prime is 8897051993. The reversal of 8897051991 is 1991507988.

8897051991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8897051991 - 2⁵ = 8897051959 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 (8897051993) 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 7 ways as a sum of consecutive naturals, for example, 1195030 + ... + 1202451.

It is an arithmetic number, because the mean of its divisors is an integer number (1484041358).

Almost surely, 2^8897051991 is an apocalyptic number.

8897051991 is a deficient number, since it is larger than the sum of its proper divisors (2975278873).

8897051991 is a wasteful number, since it uses less digits than its factorization.

8897051991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398721.

The product of its (nonzero) digits is 1632960, while the sum is 57.

The square root of 8897051991 is about 94324.1856100544. The cubic root of 8897051991 is about 2072.1222596939.

The spelling of 8897051991 in words is "eight billion, eight hundred ninety-seven million, fifty-one thousand, nine hundred ninety-one".