4399813 has 4 divisors (see below), whose sum is σ = 4799808. Its totient is φ = 3999820.

The previous prime is 4399789. The next prime is 4399817. The reversal of 4399813 is 3189934.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 4399813 - 2⁹ = 4399301 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 (4399817) 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, 199981 + ... + 200002.

It is an arithmetic number, because the mean of its divisors is an integer number (1199952).

Almost surely, 2^4399813 is an apocalyptic number.

It is an amenable number.

4399813 is a deficient number, since it is larger than the sum of its proper divisors (399995).

4399813 is a wasteful number, since it uses less digits than its factorization.

4399813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399994.

The product of its digits is 23328, while the sum is 37.

The square root of 4399813 is about 2097.5731214906. The cubic root of 4399813 is about 163.8619326770.

It can be divided in two parts, 43 and 99813, that added together give a square (99856 = 316²).

The spelling of 4399813 in words is "four million, three hundred ninety-nine thousand, eight hundred thirteen".