2187982 has 4 divisors (see below), whose sum is σ = 3281976. Its totient is φ = 1093990.

The previous prime is 2187979. The next prime is 2188001. The reversal of 2187982 is 2897812.

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

It is an Ulam number.

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, 546994 + ... + 546997.

It is an arithmetic number, because the mean of its divisors is an integer number (820494).

2^2187982 is an apocalyptic number.

2187982 is a deficient number, since it is larger than the sum of its proper divisors (1093994).

2187982 is a wasteful number, since it uses less digits than its factorization.

2187982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093993.

The product of its digits is 16128, while the sum is 37.

The square root of 2187982 is about 1479.1828825402. The cubic root of 2187982 is about 129.8218862543.

The spelling of 2187982 in words is "two million, one hundred eighty-seven thousand, nine hundred eighty-two".