2081637 has 6 divisors (see below), whose sum is σ = 3006822. Its totient is φ = 1387752.

The previous prime is 2081627. The next prime is 2081647. The reversal of 2081637 is 7361802.

2081637 is a `hidden beast` number, since 20 + 8 + 1 + 637 = 666.

It is an interprime number because it is at equal distance from previous prime (2081627) and next prime (2081647).

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 25281 = 1434^2 + 159^2 .

It is not a de Polignac number, because 2081637 - 2¹⁶ = 2016101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2081637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 115638 + ... + 115655.

It is an arithmetic number, because the mean of its divisors is an integer number (501137).

2^2081637 is an apocalyptic number.

It is an amenable number.

2081637 is a deficient number, since it is larger than the sum of its proper divisors (925185).

2081637 is a wasteful number, since it uses less digits than its factorization.

2081637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231299 (or 231296 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2081637 is about 1442.7879262040. The cubic root of 2081637 is about 127.6835648867.

The spelling of 2081637 in words is "two million, eighty-one thousand, six hundred thirty-seven".