503943369 has 4 divisors (see below), whose sum is σ = 671924496. Its totient is φ = 335962244.

The previous prime is 503943361. The next prime is 503943371. The reversal of 503943369 is 963349305.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 503943369 - 2³ = 503943361 is a prime.

It is a super-2 number, since 2×503943369² = 507917838318140322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 503943369.

It is not an unprimeable number, because it can be changed into a prime (503943361) 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, 83990559 + ... + 83990564.

It is an arithmetic number, because the mean of its divisors is an integer number (167981124).

Almost surely, 2^503943369 is an apocalyptic number.

It is an amenable number.

503943369 is a deficient number, since it is larger than the sum of its proper divisors (167981127).

503943369 is a wasteful number, since it uses less digits than its factorization.

503943369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167981126.

The product of its (nonzero) digits is 262440, while the sum is 42.

The square root of 503943369 is about 22448.6830125956. The cubic root of 503943369 is about 795.7816338506.

The spelling of 503943369 in words is "five hundred three million, nine hundred forty-three thousand, three hundred sixty-nine".