3969549 has 24 divisors (see below), whose sum is σ = 6046560. Its totient is φ = 2505888.

The previous prime is 3969529. The next prime is 3969557. The reversal of 3969549 is 9459693.

It is a happy number.

It is not a de Polignac number, because 3969549 - 2⁷ = 3969421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3969529) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17374 + ... + 17600.

It is an arithmetic number, because the mean of its divisors is an integer number (251940).

Almost surely, 2^3969549 is an apocalyptic number.

It is an amenable number.

3969549 is a deficient number, since it is larger than the sum of its proper divisors (2077011).

3969549 is a wasteful number, since it uses less digits than its factorization.

3969549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 326 counting only the distinct ones).

The product of its digits is 262440, while the sum is 45.

The square root of 3969549 is about 1992.3727060969. The cubic root of 3969549 is about 158.3362624266.

The spelling of 3969549 in words is "three million, nine hundred sixty-nine thousand, five hundred forty-nine".