8997865 has 4 divisors (see below), whose sum is σ = 10797444. Its totient is φ = 7198288.

The previous prime is 8997847. The next prime is 8997869. The reversal of 8997865 is 5687998.

8997865 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, and also an emirpimes, since its reverse is a distinct semiprime: 5687998 = 2 ⋅2843999.

It can be written as a sum of positive squares in 2 ways, for example, as 1879641 + 7118224 = 1371^2 + 2668^2 .

It is a cyclic number.

It is not a de Polignac number, because 8997865 - 2⁹ = 8997353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8997869) 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, 899782 + ... + 899791.

It is an arithmetic number, because the mean of its divisors is an integer number (2699361).

Almost surely, 2^8997865 is an apocalyptic number.

It is an amenable number.

8997865 is a deficient number, since it is larger than the sum of its proper divisors (1799579).

8997865 is a wasteful number, since it uses less digits than its factorization.

8997865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799578.

The product of its digits is 1088640, while the sum is 52.

The square root of 8997865 is about 2999.6441455613. The cubic root of 8997865 is about 207.9919329342.

The spelling of 8997865 in words is "eight million, nine hundred ninety-seven thousand, eight hundred sixty-five".