3889709 has 4 divisors (see below), whose sum is σ = 3893916. Its totient is φ = 3885504.

The previous prime is 3889679. The next prime is 3889727. The reversal of 3889709 is 9079883.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9079883 = 47 ⋅193189.

It can be written as a sum of positive squares in 2 ways, for example, as 2992900 + 896809 = 1730^2 + 947^2 .

It is a cyclic number.

It is not a de Polignac number, because 3889709 - 2⁸ = 3889453 is a prime.

It is a super-2 number, since 2×3889709² = 30259672209362, which contains 22 as substring.

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 3889709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3889729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44 + ... + 2789.

It is an arithmetic number, because the mean of its divisors is an integer number (973479).

Almost surely, 2^3889709 is an apocalyptic number.

It is an amenable number.

3889709 is a deficient number, since it is larger than the sum of its proper divisors (4207).

3889709 is a wasteful number, since it uses less digits than its factorization.

3889709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4206.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 3889709 is about 1972.2345195235. The cubic root of 3889709 is about 157.2675196143.

The spelling of 3889709 in words is "three million, eight hundred eighty-nine thousand, seven hundred nine".