3889999 has 4 divisors (see below), whose sum is σ = 3899920.
Its totient is φ = 3880080.
The previous prime is 3889993. The next prime is 3890011. The reversal of 3889999 is 9999883.
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 3889999 - 213 = 3881807 is a prime.
It is a Duffinian number.
3889999 is a modest number, since divided by 9999 gives 388 as remainder.
It is a plaindrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (3889993) 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, 4347 + ... + 5164.
It is an arithmetic number, because the mean of its divisors is an integer number (974980).
Almost surely, 23889999 is an apocalyptic number.
3889999 is a deficient number, since it is larger than the sum of its proper divisors (9921).
3889999 is an equidigital number, since it uses as much as digits as its factorization.
3889999 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 9920.
The product of its digits is 1259712, while the sum is 55.
The square root of 3889999 is about 1972.3080388215.
The cubic root of 3889999 is about 157.2714279141.
The spelling of 3889999 in words is "three million, eight hundred eighty-nine thousand, nine hundred ninety-nine".