3889661 has 4 divisors (see below), whose sum is σ = 4094400. Its totient is φ = 3684924.

The previous prime is 3889657. The next prime is 3889667. The reversal of 3889661 is 1669883.

It is a happy number.

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 3889661 - 2² = 3889657 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 (3889667) 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, 102341 + ... + 102378.

It is an arithmetic number, because the mean of its divisors is an integer number (1023600).

Almost surely, 2^3889661 is an apocalyptic number.

It is an amenable number.

3889661 is a deficient number, since it is larger than the sum of its proper divisors (204739).

3889661 is a wasteful number, since it uses less digits than its factorization.

3889661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204738.

The product of its digits is 62208, while the sum is 41.

The square root of 3889661 is about 1972.2223505477. Note that the first 3 decimals coincide. The cubic root of 3889661 is about 157.2668727045.

The spelling of 3889661 in words is "three million, eight hundred eighty-nine thousand, six hundred sixty-one".