2196905 has 4 divisors (see below), whose sum is σ = 2636292. Its totient is φ = 1757520.

The previous prime is 2196889. The next prime is 2196917. The reversal of 2196905 is 5096912.

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 619369 + 1577536 = 787^2 + 1256^2 .

It is not a de Polignac number, because 2196905 - 2⁴ = 2196889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219686 + ... + 219695.

It is an arithmetic number, because the mean of its divisors is an integer number (659073).

2^2196905 is an apocalyptic number.

It is an amenable number.

2196905 is a deficient number, since it is larger than the sum of its proper divisors (439387).

2196905 is an equidigital number, since it uses as much as digits as its factorization.

2196905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439386.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 2196905 is about 1482.1960059317. The cubic root of 2196905 is about 129.9981262057.

The spelling of 2196905 in words is "two million, one hundred ninety-six thousand, nine hundred five".