2063639 has 4 divisors (see below), whose sum is σ = 2130240. Its totient is φ = 1997040.

The previous prime is 2063627. The next prime is 2063651. The reversal of 2063639 is 9363602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9363602 = 2 ⋅4681801.

It is an interprime number because it is at equal distance from previous prime (2063627) and next prime (2063651).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2063639 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 (2063339) 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, 33254 + ... + 33315.

It is an arithmetic number, because the mean of its divisors is an integer number (532560).

2^2063639 is an apocalyptic number.

2063639 is a deficient number, since it is larger than the sum of its proper divisors (66601).

2063639 is an equidigital number, since it uses as much as digits as its factorization.

2063639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66600.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 2063639 is about 1436.5371558021. The cubic root of 2063639 is about 127.3145117751.

The spelling of 2063639 in words is "two million, sixty-three thousand, six hundred thirty-nine".