3997887 has 8 divisors (see below), whose sum is σ = 5474736. Its totient is φ = 2593152.

The previous prime is 3997871. The next prime is 3997891. The reversal of 3997887 is 7887993.

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 3997887 - 2⁴ = 3997871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997897) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17898 + ... + 18119.

It is an arithmetic number, because the mean of its divisors is an integer number (684342).

Almost surely, 2^3997887 is an apocalyptic number.

3997887 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3997887 is a deficient number, since it is larger than the sum of its proper divisors (1476849).

3997887 is a wasteful number, since it uses less digits than its factorization.

3997887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36057.

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

The square root of 3997887 is about 1999.4716802196. The cubic root of 3997887 is about 158.7121487867.

It can be divided in two parts, 3997 and 887, that added together give a palindrome (4884).

The spelling of 3997887 in words is "three million, nine hundred ninety-seven thousand, eight hundred eighty-seven".