3988999 has 8 divisors (see below), whose sum is σ = 4827168. Its totient is φ = 3217920.

The previous prime is 3988991. The next prime is 3989003. The reversal of 3988999 is 9998893.

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

It is a cyclic number.

It is not a de Polignac number, because 3988999 - 2³ = 3988991 is a prime.

It is a super-2 number, since 2×3988999² = 31824226044002, which contains 22 as substring.

It is a Duffinian number.

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 (3988991) 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, 16642 + ... + 16879.

It is an arithmetic number, because the mean of its divisors is an integer number (603396).

Almost surely, 2^3988999 is an apocalyptic number.

3988999 is a deficient number, since it is larger than the sum of its proper divisors (838169).

3988999 is a wasteful number, since it uses less digits than its factorization.

3988999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33545.

The product of its digits is 1259712, while the sum is 55.

The square root of 3988999 is about 1997.2478564264. The cubic root of 3988999 is about 158.5944465911.

The spelling of 3988999 in words is "three million, nine hundred eighty-eight thousand, nine hundred ninety-nine".