8761891 has 4 divisors (see below), whose sum is σ = 8785152. Its totient is φ = 8738632.

The previous prime is 8761889. The next prime is 8761903. The reversal of 8761891 is 1981678.

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 8761891 - 2¹ = 8761889 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8761691) 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, 11056 + ... + 11821.

It is an arithmetic number, because the mean of its divisors is an integer number (2196288).

Almost surely, 2^8761891 is an apocalyptic number.

8761891 is a deficient number, since it is larger than the sum of its proper divisors (23261).

8761891 is a wasteful number, since it uses less digits than its factorization.

8761891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23260.

The product of its digits is 24192, while the sum is 40.

The square root of 8761891 is about 2960.0491549973. The cubic root of 8761891 is about 206.1575678874.

The spelling of 8761891 in words is "eight million, seven hundred sixty-one thousand, eight hundred ninety-one".