3998123 has 4 divisors (see below), whose sum is σ = 4063728. Its totient is φ = 3932520.

The previous prime is 3998119. The next prime is 3998131. The reversal of 3998123 is 3218993.

3998123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3998123 - 2² = 3998119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3998173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32711 + ... + 32832.

It is an arithmetic number, because the mean of its divisors is an integer number (1015932).

Almost surely, 2^3998123 is an apocalyptic number.

3998123 is a deficient number, since it is larger than the sum of its proper divisors (65605).

3998123 is an equidigital number, since it uses as much as digits as its factorization.

3998123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65604.

The product of its digits is 11664, while the sum is 35.

The square root of 3998123 is about 1999.5306949382. The cubic root of 3998123 is about 158.7152717139.

It can be divided in two parts, 39981 and 23, that added together give a palindrome (40004).

The spelling of 3998123 in words is "three million, nine hundred ninety-eight thousand, one hundred twenty-three".