2053639 has 6 divisors (see below), whose sum is σ = 2388984. Its totient is φ = 1760220.

The previous prime is 2053631. The next prime is 2053643. The reversal of 2053639 is 9363502.

It is not a de Polignac number, because 2053639 - 2³ = 2053631 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 (2053631) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20907 + ... + 21004.

It is an arithmetic number, because the mean of its divisors is an integer number (398164).

2^2053639 is an apocalyptic number.

2053639 is a deficient number, since it is larger than the sum of its proper divisors (335345).

2053639 is an equidigital number, since it uses as much as digits as its factorization.

2053639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41925 (or 41918 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 28.

The square root of 2053639 is about 1433.0523367972. The cubic root of 2053639 is about 127.1085314422.

It can be divided in two parts, 205 and 3639, that added together give a square (3844 = 62²).

The spelling of 2053639 in words is "two million, fifty-three thousand, six hundred thirty-nine".