3939661 has 8 divisors (see below), whose sum is σ = 4312224. Its totient is φ = 3569520.

The previous prime is 3939641. The next prime is 3939671. The reversal of 3939661 is 1669393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3939661 - 2⁹ = 3939149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3939661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5806 + ... + 6448.

It is an arithmetic number, because the mean of its divisors is an integer number (539028).

Almost surely, 2^3939661 is an apocalyptic number.

It is an amenable number.

3939661 is a deficient number, since it is larger than the sum of its proper divisors (372563).

3939661 is a wasteful number, since it uses less digits than its factorization.

3939661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211.

The product of its digits is 26244, while the sum is 37.

The square root of 3939661 is about 1984.8579294247. The cubic root of 3939661 is about 157.9378728129.

The spelling of 3939661 in words is "three million, nine hundred thirty-nine thousand, six hundred sixty-one".