3925839 has 4 divisors (see below), whose sum is σ = 5234456. Its totient is φ = 2617224.

The previous prime is 3925829. The next prime is 3925841. The reversal of 3925839 is 9385293.

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

It is not a de Polignac number, because 3925839 - 2⁵ = 3925807 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3925797 and 3925806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3925829) 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, 654304 + ... + 654309.

It is an arithmetic number, because the mean of its divisors is an integer number (1308614).

Almost surely, 2^3925839 is an apocalyptic number.

3925839 is a deficient number, since it is larger than the sum of its proper divisors (1308617).

3925839 is a wasteful number, since it uses less digits than its factorization.

3925839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308616.

The product of its digits is 58320, while the sum is 39.

The square root of 3925839 is about 1981.3730087997. The cubic root of 3925839 is about 157.7529520588.

It can be divided in two parts, 39 and 25839, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 3925839 in words is "three million, nine hundred twenty-five thousand, eight hundred thirty-nine".