2100989 has 8 divisors (see below), whose sum is σ = 2302560. Its totient is φ = 1901200.

The previous prime is 2100983. The next prime is 2100991. The reversal of 2100989 is 9890012.

2100989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 2100989 - 2⁸ = 2100733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4034 + ... + 4524.

It is an arithmetic number, because the mean of its divisors is an integer number (287820).

2^2100989 is an apocalyptic number.

It is an amenable number.

2100989 is a deficient number, since it is larger than the sum of its proper divisors (201571).

2100989 is a wasteful number, since it uses less digits than its factorization.

2100989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 2100989 is about 1449.4788718709. The cubic root of 2100989 is about 128.0780164039.

The spelling of 2100989 in words is "two million, one hundred thousand, nine hundred eighty-nine".