4123639 has 16 divisors (see below), whose sum is σ = 4814208. Its totient is φ = 3497472.

The previous prime is 4123633. The next prime is 4123643. The reversal of 4123639 is 9363214.

It is a cyclic number.

It is not a de Polignac number, because 4123639 - 2⁹ = 4123127 is a prime.

It is a Duffinian number.

4123639 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4123633) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10189 + ... + 10585.

It is an arithmetic number, because the mean of its divisors is an integer number (300888).

Almost surely, 2^4123639 is an apocalyptic number.

4123639 is a deficient number, since it is larger than the sum of its proper divisors (690569).

4123639 is a wasteful number, since it uses less digits than its factorization.

4123639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474.

The product of its digits is 3888, while the sum is 28.

The square root of 4123639 is about 2030.6745184790. The cubic root of 4123639 is about 160.3590763607.

The spelling of 4123639 in words is "four million, one hundred twenty-three thousand, six hundred thirty-nine".