3974839 has 4 divisors (see below), whose sum is σ = 4336200. Its totient is φ = 3613480.

The previous prime is 3974833. The next prime is 3974849. The reversal of 3974839 is 9384793.

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 3974839 - 2¹¹ = 3972791 is a prime.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 3974795 and 3974804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3974833) 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, 180664 + ... + 180685.

It is an arithmetic number, because the mean of its divisors is an integer number (1084050).

Almost surely, 2^3974839 is an apocalyptic number.

3974839 is a deficient number, since it is larger than the sum of its proper divisors (361361).

3974839 is a wasteful number, since it uses less digits than its factorization.

3974839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361360.

The product of its digits is 163296, while the sum is 43.

The square root of 3974839 is about 1993.6998269549. The cubic root of 3974839 is about 158.4065665534.

The spelling of 3974839 in words is "three million, nine hundred seventy-four thousand, eight hundred thirty-nine".