399855341 has 4 divisors (see below), whose sum is σ = 399906300. Its totient is φ = 399804384.

The previous prime is 399855311. The next prime is 399855343. The reversal of 399855341 is 143558993.

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 81090025 + 318765316 = 9005^2 + 17854^2 .

It is a cyclic number.

It is not a de Polignac number, because 399855341 - 2¹⁸ = 399593197 is a prime.

It is a super-3 number, since 3×399855341³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399855343) 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, 10946 + ... + 30323.

It is an arithmetic number, because the mean of its divisors is an integer number (99976575).

Almost surely, 2^399855341 is an apocalyptic number.

It is an amenable number.

399855341 is a deficient number, since it is larger than the sum of its proper divisors (50959).

399855341 is an equidigital number, since it uses as much as digits as its factorization.

399855341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50958.

The product of its digits is 583200, while the sum is 47.

The square root of 399855341 is about 19996.3831979686. The cubic root of 399855341 is about 736.7174676332.

The spelling of 399855341 in words is "three hundred ninety-nine million, eight hundred fifty-five thousand, three hundred forty-one".