8957891 has 4 divisors (see below), whose sum is σ = 8976000. Its totient is φ = 8939784.

The previous prime is 8957887. The next prime is 8957899. The reversal of 8957891 is 1987598.

It is a happy number.

8957891 is digitally balanced in base 2, 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 8957891 - 2² = 8957887 is a prime.

It is a super-2 number, since 2×8957891² = 160487622335762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8957899) 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, 8291 + ... + 9308.

It is an arithmetic number, because the mean of its divisors is an integer number (2244000).

Almost surely, 2^8957891 is an apocalyptic number.

8957891 is a deficient number, since it is larger than the sum of its proper divisors (18109).

8957891 is a wasteful number, since it uses less digits than its factorization.

8957891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18108.

The product of its digits is 181440, while the sum is 47.

The square root of 8957891 is about 2992.9736049621. The cubic root of 8957891 is about 207.6834667089.

The spelling of 8957891 in words is "eight million, nine hundred fifty-seven thousand, eight hundred ninety-one".