3986609 has 4 divisors (see below), whose sum is σ = 4349040. Its totient is φ = 3624180.

The previous prime is 3986597. The next prime is 3986611. The reversal of 3986609 is 9066893.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3986609 - 2¹² = 3982513 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3986669) 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, 181199 + ... + 181220.

It is an arithmetic number, because the mean of its divisors is an integer number (1087260).

Almost surely, 2^3986609 is an apocalyptic number.

It is an amenable number.

3986609 is a deficient number, since it is larger than the sum of its proper divisors (362431).

3986609 is a wasteful number, since it uses less digits than its factorization.

3986609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362430.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 3986609 is about 1996.6494434427. The cubic root of 3986609 is about 158.5627664250.

It can be divided in two parts, 398 and 6609, that added together give a palindrome (7007).

The spelling of 3986609 in words is "three million, nine hundred eighty-six thousand, six hundred nine".