399359503 has 4 divisors (see below), whose sum is σ = 399405888. Its totient is φ = 399313120.

The previous prime is 399359483. The next prime is 399359549. The reversal of 399359503 is 305953993.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 305953993 = 223 ⋅1371991.

It is a cyclic number.

It is not a de Polignac number, because 399359503 - 2¹³ = 399351311 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 (399353503) 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, 6058 + ... + 28903.

It is an arithmetic number, because the mean of its divisors is an integer number (99851472).

Almost surely, 2^399359503 is an apocalyptic number.

399359503 is a deficient number, since it is larger than the sum of its proper divisors (46385).

399359503 is a wasteful number, since it uses less digits than its factorization.

399359503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46384.

The product of its (nonzero) digits is 492075, while the sum is 46.

The square root of 399359503 is about 19983.9811599191. The cubic root of 399359503 is about 736.4128211146.

The spelling of 399359503 in words is "three hundred ninety-nine million, three hundred fifty-nine thousand, five hundred three".