3876989 has 4 divisors (see below), whose sum is σ = 3886620. Its totient is φ = 3867360.

The previous prime is 3876979. The next prime is 3876991. The reversal of 3876989 is 9896783.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9896783 = 13 ⋅761291.

It can be written as a sum of positive squares in 2 ways, for example, as 209764 + 3667225 = 458^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 3876989 - 2⁴ = 3876973 is a prime.

It is a super-2 number, since 2×3876989² = 30062087412242, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3876959) 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, 4184 + ... + 5025.

It is an arithmetic number, because the mean of its divisors is an integer number (971655).

Almost surely, 2^3876989 is an apocalyptic number.

It is an amenable number.

3876989 is a deficient number, since it is larger than the sum of its proper divisors (9631).

3876989 is an equidigital number, since it uses as much as digits as its factorization.

3876989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9630.

The product of its digits is 653184, while the sum is 50.

The square root of 3876989 is about 1969.0071101954. The cubic root of 3876989 is about 157.0959020276.

The spelling of 3876989 in words is "three million, eight hundred seventy-six thousand, nine hundred eighty-nine".