399882013 has 4 divisors (see below), whose sum is σ = 399957948. Its totient is φ = 399806080.

The previous prime is 399881987. The next prime is 399882053. The reversal of 399882013 is 310288993.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 264322564 + 135559449 = 16258^2 + 11643^2 .

It is a cyclic number.

It is not a de Polignac number, because 399882013 - 2⁹ = 399881501 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 (399882053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29428 + ... + 40813.

It is an arithmetic number, because the mean of its divisors is an integer number (99989487).

Almost surely, 2^399882013 is an apocalyptic number.

It is an amenable number.

399882013 is a deficient number, since it is larger than the sum of its proper divisors (75935).

399882013 is an equidigital number, since it uses as much as digits as its factorization.

399882013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75934.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 399882013 is about 19997.0501074533. The cubic root of 399882013 is about 736.7338479666.

The spelling of 399882013 in words is "three hundred ninety-nine million, eight hundred eighty-two thousand, thirteen".