3994539 has 4 divisors (see below), whose sum is σ = 5326056. Its totient is φ = 2663024.

The previous prime is 3994537. The next prime is 3994553. The reversal of 3994539 is 9354993.

It is a happy number.

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 3994539 - 2¹ = 3994537 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 3994539.

It is not an unprimeable number, because it can be changed into a prime (3994537) 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, 665754 + ... + 665759.

It is an arithmetic number, because the mean of its divisors is an integer number (1331514).

Almost surely, 2^3994539 is an apocalyptic number.

3994539 is a deficient number, since it is larger than the sum of its proper divisors (1331517).

3994539 is a wasteful number, since it uses less digits than its factorization.

3994539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331516.

The product of its digits is 131220, while the sum is 42.

The square root of 3994539 is about 1998.6342837048. The cubic root of 3994539 is about 158.6678323204.

The spelling of 3994539 in words is "three million, nine hundred ninety-four thousand, five hundred thirty-nine".