2101998 has 16 divisors (see below), whose sum is σ = 4225536. Its totient is φ = 697080.

The previous prime is 2101961. The next prime is 2102021. The reversal of 2101998 is 8991012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 553 + ... + 2123.

It is an arithmetic number, because the mean of its divisors is an integer number (264096).

2^2101998 is an apocalyptic number.

2101998 is an abundant number, since it is smaller than the sum of its proper divisors (2123538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2101998 is a wasteful number, since it uses less digits than its factorization.

2101998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 2101998 is about 1449.8268862178. The cubic root of 2101998 is about 128.0985162791.

The spelling of 2101998 in words is "two million, one hundred one thousand, nine hundred ninety-eight".