399585103 has 2 divisors, whose sum is σ = 399585104. Its totient is φ = 399585102.

The previous prime is 399585097. The next prime is 399585161. The reversal of 399585103 is 301585993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399585103 - 2¹⁷ = 399454031 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399585103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399585203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199792551 + 199792552.

It is an arithmetic number, because the mean of its divisors is an integer number (199792552).

Almost surely, 2^399585103 is an apocalyptic number.

399585103 is a deficient number, since it is larger than the sum of its proper divisors (1).

399585103 is an equidigital number, since it uses as much as digits as its factorization.

399585103 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145800, while the sum is 43.

The square root of 399585103 is about 19989.6248839242. The cubic root of 399585103 is about 736.5514626624.

It can be divided in two parts, 3995 and 85103, that added together give a palindrome (89098).

The spelling of 399585103 in words is "three hundred ninety-nine million, five hundred eighty-five thousand, one hundred three".