2117966 has 4 divisors (see below), whose sum is σ = 3176952. Its totient is φ = 1058982.

The previous prime is 2117953. The next prime is 2117971. The reversal of 2117966 is 6697112.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 529490 + ... + 529493.

It is an arithmetic number, because the mean of its divisors is an integer number (794238).

2^2117966 is an apocalyptic number.

2117966 is a deficient number, since it is larger than the sum of its proper divisors (1058986).

2117966 is a wasteful number, since it uses less digits than its factorization.

2117966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058985.

The product of its digits is 4536, while the sum is 32.

The square root of 2117966 is about 1455.3233317720. The cubic root of 2117966 is about 128.4220686504.

The spelling of 2117966 in words is "two million, one hundred seventeen thousand, nine hundred sixty-six".