3990199 has 4 divisors (see below), whose sum is σ = 3994200. Its totient is φ = 3986200.

The previous prime is 3990187. The next prime is 3990241. The reversal of 3990199 is 9910993.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3990199 - 2¹¹ = 3988151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852 + ... + 2950.

It is an arithmetic number, because the mean of its divisors is an integer number (998550).

Almost surely, 2^3990199 is an apocalyptic number.

3990199 is a deficient number, since it is larger than the sum of its proper divisors (4001).

3990199 is a wasteful number, since it uses less digits than its factorization.

3990199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 3990199 is about 1997.5482472271. The cubic root of 3990199 is about 158.6103481791.

It can be divided in two parts, 39901 and 99, that added together give a square (40000 = 200²).

The spelling of 3990199 in words is "three million, nine hundred ninety thousand, one hundred ninety-nine".