7897865 has 8 divisors (see below), whose sum is σ = 9592128. Its totient is φ = 6241840.

The previous prime is 7897861. The next prime is 7897873. The reversal of 7897865 is 5687987.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7897865 - 2² = 7897861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7897861) 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, 9101 + ... + 9930.

It is an arithmetic number, because the mean of its divisors is an integer number (1199016).

Almost surely, 2^7897865 is an apocalyptic number.

It is an amenable number.

7897865 is a deficient number, since it is larger than the sum of its proper divisors (1694263).

7897865 is a wasteful number, since it uses less digits than its factorization.

7897865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19119.

The product of its digits is 846720, while the sum is 50.

The square root of 7897865 is about 2810.3140393913. The cubic root of 7897865 is about 199.1452270202.

The spelling of 7897865 in words is "seven million, eight hundred ninety-seven thousand, eight hundred sixty-five".