4399879 has 4 divisors (see below), whose sum is σ = 4799880. Its totient is φ = 3999880.

The previous prime is 4399873. The next prime is 4399883. The reversal of 4399879 is 9789934.

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 4399879 - 2⁵ = 4399847 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 4⁴ + 3¹³ + 9 + 9⁵ + 8⁷ + 7⁶ + 9⁶ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4399873) 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, 199984 + ... + 200005.

It is an arithmetic number, because the mean of its divisors is an integer number (1199970).

Almost surely, 2^4399879 is an apocalyptic number.

4399879 is a deficient number, since it is larger than the sum of its proper divisors (400001).

4399879 is a wasteful number, since it uses less digits than its factorization.

4399879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400000.

The product of its digits is 489888, while the sum is 49.

The square root of 4399879 is about 2097.5888538987. The cubic root of 4399879 is about 163.8627520174.

The spelling of 4399879 in words is "four million, three hundred ninety-nine thousand, eight hundred seventy-nine".