3987789 has 8 divisors (see below), whose sum is σ = 5726112. Its totient is φ = 2454000.

The previous prime is 3987769. The next prime is 3987791. The reversal of 3987789 is 9877893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3987789 - 2⁵ = 3987757 is a prime.

It is a super-2 number, since 2×3987789² = 31804922217042, which contains 22 as substring.

3987789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987769) 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 7 ways as a sum of consecutive naturals, for example, 51087 + ... + 51164.

It is an arithmetic number, because the mean of its divisors is an integer number (715764).

Almost surely, 2^3987789 is an apocalyptic number.

3987789 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

3987789 is a deficient number, since it is larger than the sum of its proper divisors (1738323).

3987789 is a wasteful number, since it uses less digits than its factorization.

3987789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102267.

The product of its digits is 762048, while the sum is 51.

The square root of 3987789 is about 1996.9449166164. The cubic root of 3987789 is about 158.5784092606.

The spelling of 3987789 in words is "three million, nine hundred eighty-seven thousand, seven hundred eighty-nine".