2072639 has 4 divisors (see below), whose sum is σ = 2075520. Its totient is φ = 2069760.

The previous prime is 2072617. The next prime is 2072647. The reversal of 2072639 is 9362702.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2072639 - 2⁸ = 2072383 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 (2072699) 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 3 ways as a sum of consecutive naturals, for example, 674 + ... + 2144.

It is an arithmetic number, because the mean of its divisors is an integer number (518880).

2^2072639 is an apocalyptic number.

2072639 is a deficient number, since it is larger than the sum of its proper divisors (2881).

2072639 is a wasteful number, since it uses less digits than its factorization.

2072639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2880.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 2072639 is about 1439.6662807748. Note that the first 3 decimals coincide. The cubic root of 2072639 is about 127.4993258967.

The spelling of 2072639 in words is "two million, seventy-two thousand, six hundred thirty-nine".