2107639 has 4 divisors (see below), whose sum is σ = 2112880. Its totient is φ = 2102400.

The previous prime is 2107627. The next prime is 2107661. The reversal of 2107639 is 9367012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2107639 - 2⁵ = 2107607 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 (2107669) 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, 1962 + ... + 2839.

It is an arithmetic number, because the mean of its divisors is an integer number (528220).

2^2107639 is an apocalyptic number.

2107639 is a deficient number, since it is larger than the sum of its proper divisors (5241).

2107639 is an equidigital number, since it uses as much as digits as its factorization.

2107639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 2107639 is about 1451.7709874495. The cubic root of 2107639 is about 128.2130039063.

It can be divided in two parts, 21076 and 39, that added together give a triangular number (21115 = T₂₀₅).

The spelling of 2107639 in words is "two million, one hundred seven thousand, six hundred thirty-nine".