2168986 has 4 divisors (see below), whose sum is σ = 3253482. Its totient is φ = 1084492.

The previous prime is 2168953. The next prime is 2168987. The reversal of 2168986 is 6898612.

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

It can be written as a sum of positive squares in only one way, i.e., 2157961 + 11025 = 1469^2 + 105^2 .

It is not an unprimeable number, because it can be changed into a prime (2168987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 542245 + ... + 542248.

2^2168986 is an apocalyptic number.

2168986 is a deficient number, since it is larger than the sum of its proper divisors (1084496).

2168986 is a wasteful number, since it uses less digits than its factorization.

2168986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1084495.

The product of its digits is 41472, while the sum is 40.

The square root of 2168986 is about 1472.7477720234. The cubic root of 2168986 is about 129.4450903397.

The spelling of 2168986 in words is "two million, one hundred sixty-eight thousand, nine hundred eighty-six".