3897999 has 18 divisors (see below), whose sum is σ = 6550440. Its totient is φ = 2227176.

The previous prime is 3897973. The next prime is 3898001. The reversal of 3897999 is 9997983.

It is a happy number.

It is not a de Polignac number, because 3897999 - 2⁵ = 3897967 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3897499) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3979 + ... + 4860.

Almost surely, 2^3897999 is an apocalyptic number.

3897999 is a deficient number, since it is larger than the sum of its proper divisors (2652441).

3897999 is a wasteful number, since it uses less digits than its factorization.

3897999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8859 (or 8849 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 3897999 is about 1974.3350779440. The cubic root of 3897999 is about 157.3791665800.

The spelling of 3897999 in words is "three million, eight hundred ninety-seven thousand, nine hundred ninety-nine".