3969556 has 18 divisors (see below), whose sum is σ = 7334250. Its totient is φ = 1879632.

The previous prime is 3969529. The next prime is 3969557. The reversal of 3969556 is 6559693.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 2669956 + 1299600 = 1634^2 + 1140^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969557) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 70 + ... + 2818.

Almost surely, 2^3969556 is an apocalyptic number.

It is an amenable number.

3969556 is a deficient number, since it is larger than the sum of its proper divisors (3364694).

3969556 is a wasteful number, since it uses less digits than its factorization.

3969556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791 (or 2770 counting only the distinct ones).

The product of its digits is 218700, while the sum is 43.

The square root of 3969556 is about 1992.3744627956. The cubic root of 3969556 is about 158.3363554979.

The spelling of 3969556 in words is "three million, nine hundred sixty-nine thousand, five hundred fifty-six".