2168897 has 4 divisors (see below), whose sum is σ = 2174340. Its totient is φ = 2163456.

The previous prime is 2168893. The next prime is 2168917. The reversal of 2168897 is 7988612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 591361 + 1577536 = 769^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168897 - 2² = 2168893 is a prime.

It is a super-2 number, since 2×2168897² = 9408228393218, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹³ + 1 + 6⁶ + 8 + 8⁷ + 9² + 7⁵ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2168893) 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, 2072 + ... + 2937.

It is an arithmetic number, because the mean of its divisors is an integer number (543585).

2^2168897 is an apocalyptic number.

It is an amenable number.

2168897 is a deficient number, since it is larger than the sum of its proper divisors (5443).

2168897 is an equidigital number, since it uses as much as digits as its factorization.

2168897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442.

The product of its digits is 48384, while the sum is 41.

The square root of 2168897 is about 1472.7175560847. The cubic root of 2168897 is about 129.4433198088.

The spelling of 2168897 in words is "two million, one hundred sixty-eight thousand, eight hundred ninety-seven".