8997891 has 8 divisors (see below), whose sum is σ = 13711104. Its totient is φ = 5141640.

The previous prime is 8997889. The next prime is 8997931. The reversal of 8997891 is 1987998.

8997891 is digitally balanced in base 3, 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 8997891 - 2¹ = 8997889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8997871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214215 + ... + 214256.

It is an arithmetic number, because the mean of its divisors is an integer number (1713888).

Almost surely, 2^8997891 is an apocalyptic number.

8997891 is a deficient number, since it is larger than the sum of its proper divisors (4713213).

8997891 is a wasteful number, since it uses less digits than its factorization.

8997891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428481.

The product of its digits is 326592, while the sum is 51.

The square root of 8997891 is about 2999.6484794055. The cubic root of 8997891 is about 207.9921332700.

The spelling of 8997891 in words is "eight million, nine hundred ninety-seven thousand, eight hundred ninety-one".