3872689 has 4 divisors (see below), whose sum is σ = 4006260. Its totient is φ = 3739120.

The previous prime is 3872681. The next prime is 3872731. The reversal of 3872689 is 9862783.

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 1912689 + 1960000 = 1383^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 3872689 - 2³ = 3872681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3872681) 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, 66742 + ... + 66799.

It is an arithmetic number, because the mean of its divisors is an integer number (1001565).

Almost surely, 2^3872689 is an apocalyptic number.

It is an amenable number.

3872689 is a deficient number, since it is larger than the sum of its proper divisors (133571).

3872689 is a wasteful number, since it uses less digits than its factorization.

3872689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133570.

The product of its digits is 145152, while the sum is 43.

The square root of 3872689 is about 1967.9148863709. The cubic root of 3872689 is about 157.0378017621.

It can be divided in two parts, 38 and 72689, that added together give a palindrome (72727).

The spelling of 3872689 in words is "three million, eight hundred seventy-two thousand, six hundred eighty-nine".