2103987 has 4 divisors (see below), whose sum is σ = 2805320. Its totient is φ = 1402656.

The previous prime is 2103977. The next prime is 2103989. The reversal of 2103987 is 7893012.

It is a happy number.

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

It is not a de Polignac number, because 2103987 - 2⁷ = 2103859 is a prime.

It is a super-2 number, since 2×2103987² = 8853522592338, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2103989) 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, 350662 + ... + 350667.

It is an arithmetic number, because the mean of its divisors is an integer number (701330).

2^2103987 is an apocalyptic number.

2103987 is a deficient number, since it is larger than the sum of its proper divisors (701333).

2103987 is an equidigital number, since it uses as much as digits as its factorization.

2103987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701332.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 2103987 is about 1450.5126679902. The cubic root of 2103987 is about 128.1389076317.

Adding to 2103987 its reverse (7893012), we get a palindrome (9996999).

The spelling of 2103987 in words is "two million, one hundred three thousand, nine hundred eighty-seven".