3998679 has 4 divisors (see below), whose sum is σ = 5331576. Its totient is φ = 2665784.

The previous prime is 3998677. The next prime is 3998693. The reversal of 3998679 is 9768993.

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 3998679 - 2¹ = 3998677 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3998671) 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 3 ways as a sum of consecutive naturals, for example, 666444 + ... + 666449.

It is an arithmetic number, because the mean of its divisors is an integer number (1332894).

Almost surely, 2^3998679 is an apocalyptic number.

3998679 is a deficient number, since it is larger than the sum of its proper divisors (1332897).

3998679 is a wasteful number, since it uses less digits than its factorization.

3998679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1332896.

The product of its digits is 734832, while the sum is 51.

The square root of 3998679 is about 1999.6697227292. The cubic root of 3998679 is about 158.7226286329.

The spelling of 3998679 in words is "three million, nine hundred ninety-eight thousand, six hundred seventy-nine".