8891125209 has 6 divisors (see below), whose sum is σ = 12842736426. Its totient is φ = 5927416800.

The previous prime is 8891125181. The next prime is 8891125223. The reversal of 8891125209 is 9025211988.

8891125209 is a `hidden beast` number, since 8 + 8 + 9 + 112 + 520 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8845966809 + 45158400 = 94053^2 + 6720^2 .

It is not a de Polignac number, because 8891125209 - 2¹³ = 8891117017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8891125909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 493951392 + ... + 493951409.

It is an arithmetic number, because the mean of its divisors is an integer number (2140456071).

Almost surely, 2^8891125209 is an apocalyptic number.

It is an amenable number.

8891125209 is a deficient number, since it is larger than the sum of its proper divisors (3951611217).

8891125209 is a wasteful number, since it uses less digits than its factorization.

8891125209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 987902807 (or 987902804 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 45.

The square root of 8891125209 is about 94292.7632907213. The cubic root of 8891125209 is about 2071.6620418997.

The spelling of 8891125209 in words is "eight billion, eight hundred ninety-one million, one hundred twenty-five thousand, two hundred nine".