3987423 has 12 divisors (see below), whose sum is σ = 6283368. Its totient is φ = 2416560.

The previous prime is 3987421. The next prime is 3987427. The reversal of 3987423 is 3247893.

It is not a de Polignac number, because 3987423 - 2¹ = 3987421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3987421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20040 + ... + 20237.

It is an arithmetic number, because the mean of its divisors is an integer number (523614).

Almost surely, 2^3987423 is an apocalyptic number.

3987423 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

3987423 is a deficient number, since it is larger than the sum of its proper divisors (2295945).

3987423 is a wasteful number, since it uses less digits than its factorization.

3987423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40294 (or 40291 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 3987423 is about 1996.8532745297. The cubic root of 3987423 is about 158.5735576604.

The spelling of 3987423 in words is "three million, nine hundred eighty-seven thousand, four hundred twenty-three".