2197966 has 8 divisors (see below), whose sum is σ = 3306240. Its totient is φ = 1095888.

The previous prime is 2197961. The next prime is 2197973. The reversal of 2197966 is 6697912.

2197966 = T₁₂₀₉ + T₁₂₁₀ + T₁₂₁₁.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2197961) 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, 526 + ... + 2161.

It is an arithmetic number, because the mean of its divisors is an integer number (413280).

2^2197966 is an apocalyptic number.

2197966 is the 1211-st centered triangular number.

2197966 is a deficient number, since it is larger than the sum of its proper divisors (1108274).

2197966 is a wasteful number, since it uses less digits than its factorization.

2197966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3098.

The product of its digits is 40824, while the sum is 40.

The square root of 2197966 is about 1482.5538776045. The cubic root of 2197966 is about 130.0190504626.

The spelling of 2197966 in words is "two million, one hundred ninety-seven thousand, nine hundred sixty-six".