3879661 has 4 divisors (see below), whose sum is σ = 3943324. Its totient is φ = 3816000.

The previous prime is 3879641. The next prime is 3879671. The reversal of 3879661 is 1669783.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1674436 + 2205225 = 1294^2 + 1485^2 .

It is a cyclic number.

It is not a de Polignac number, because 3879661 - 2⁹ = 3879149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3879641) 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, 31740 + ... + 31861.

It is an arithmetic number, because the mean of its divisors is an integer number (985831).

Almost surely, 2^3879661 is an apocalyptic number.

It is an amenable number.

3879661 is a deficient number, since it is larger than the sum of its proper divisors (63663).

3879661 is an equidigital number, since it uses as much as digits as its factorization.

3879661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63662.

The product of its digits is 54432, while the sum is 40.

The square root of 3879661 is about 1969.6855078921. The cubic root of 3879661 is about 157.1319836239.

The spelling of 3879661 in words is "three million, eight hundred seventy-nine thousand, six hundred sixty-one".