2100197 has 12 divisors (see below), whose sum is σ = 2446668. Its totient is φ = 1795200.

The previous prime is 2100193. The next prime is 2100221. The reversal of 2100197 is 7910012.

It can be written as a sum of positive squares in 2 ways, for example, as 1437601 + 662596 = 1199^2 + 814^2 .

It is not a de Polignac number, because 2100197 - 2² = 2100193 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 (2100191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1547 + ... + 2567.

It is an arithmetic number, because the mean of its divisors is an integer number (203889).

2^2100197 is an apocalyptic number.

It is an amenable number.

2100197 is a deficient number, since it is larger than the sum of its proper divisors (346471).

2100197 is a wasteful number, since it uses less digits than its factorization.

2100197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1060 (or 1049 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 2100197 is about 1449.2056444825. The cubic root of 2100197 is about 128.0619207243.

The spelling of 2100197 in words is "two million, one hundred thousand, one hundred ninety-seven".