3900005 has 8 divisors (see below), whose sum is σ = 4768632. Its totient is φ = 3060928.

The previous prime is 3899989. The next prime is 3900067. The reversal of 3900005 is 5000093.

3900005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 388129 + 3511876 = 623^2 + 1874^2 .

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 3900005 - 2⁴ = 3899989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7094 + ... + 7623.

It is an arithmetic number, because the mean of its divisors is an integer number (596079).

Almost surely, 2^3900005 is an apocalyptic number.

It is an amenable number.

3900005 is a deficient number, since it is larger than the sum of its proper divisors (868627).

3900005 is a wasteful number, since it uses less digits than its factorization.

3900005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14775.

The product of its (nonzero) digits is 135, while the sum is 17.

The square root of 3900005 is about 1974.8430317370. The cubic root of 3900005 is about 157.4061589307.

Adding to 3900005 its reverse (5000093), we get a palindrome (8900098).

The spelling of 3900005 in words is "three million, nine hundred thousand, five".