399986303 has 4 divisors (see below), whose sum is σ = 400592088. Its totient is φ = 399380520.

The previous prime is 399986297. The next prime is 399986341. The reversal of 399986303 is 303689993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 303689993 = 41 ⋅7407073.

It is a cyclic number.

It is not a de Polignac number, because 399986303 - 2⁴ = 399986287 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 (399986383) 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, 301901 + ... + 303222.

It is an arithmetic number, because the mean of its divisors is an integer number (100148022).

Almost surely, 2^399986303 is an apocalyptic number.

399986303 is a deficient number, since it is larger than the sum of its proper divisors (605785).

399986303 is an equidigital number, since it uses as much as digits as its factorization.

399986303 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605784.

The product of its (nonzero) digits is 944784, while the sum is 50.

The square root of 399986303 is about 19999.6575720686. The cubic root of 399986303 is about 736.7978896022.

The spelling of 399986303 in words is "three hundred ninety-nine million, nine hundred eighty-six thousand, three hundred three".