3923639 has 8 divisors (see below), whose sum is σ = 4227072. Its totient is φ = 3631320.

The previous prime is 3923629. The next prime is 3923641. The reversal of 3923639 is 9363293.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3923639 - 2¹² = 3919543 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3923599 and 3923608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3923609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2039 + ... + 3464.

It is an arithmetic number, because the mean of its divisors is an integer number (528384).

Almost surely, 2^3923639 is an apocalyptic number.

3923639 is a deficient number, since it is larger than the sum of its proper divisors (303433).

3923639 is a wasteful number, since it uses less digits than its factorization.

3923639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557.

The product of its digits is 26244, while the sum is 35.

The square root of 3923639 is about 1980.8177604212. The cubic root of 3923639 is about 157.7234788393.

The spelling of 3923639 in words is "three million, nine hundred twenty-three thousand, six hundred thirty-nine".