520344403 has 4 divisors (see below), whose sum is σ = 521413360. Its totient is φ = 519275448.

The previous prime is 520344373. The next prime is 520344413. The reversal of 520344403 is 304443025.

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

It is a cyclic number.

It is not a de Polignac number, because 520344403 - 2⁹ = 520343891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520344413) 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, 533748 + ... + 534721.

It is an arithmetic number, because the mean of its divisors is an integer number (130353340).

Almost surely, 2^520344403 is an apocalyptic number.

520344403 is a deficient number, since it is larger than the sum of its proper divisors (1068957).

520344403 is a wasteful number, since it uses less digits than its factorization.

520344403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1068956.

The product of its (nonzero) digits is 5760, while the sum is 25.

The square root of 520344403 is about 22811.0587873514. The cubic root of 520344403 is about 804.3226445913.

Adding to 520344403 its reverse (304443025), we get a palindrome (824787428).

The spelling of 520344403 in words is "five hundred twenty million, three hundred forty-four thousand, four hundred three".