520163389 has 4 divisors (see below), whose sum is σ = 532260256. Its totient is φ = 508066524.

The previous prime is 520163387. The next prime is 520163419. The reversal of 520163389 is 983361025.

520163389 is nontrivially palindromic in base 4.

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 520163389 - 2¹ = 520163387 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 (520163383) 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, 6048369 + ... + 6048454.

It is an arithmetic number, because the mean of its divisors is an integer number (133065064).

Almost surely, 2^520163389 is an apocalyptic number.

It is an amenable number.

520163389 is a deficient number, since it is larger than the sum of its proper divisors (12096867).

520163389 is a wasteful number, since it uses less digits than its factorization.

520163389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12096866.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 520163389 is about 22807.0907614277. The cubic root of 520163389 is about 804.2293662777.

The spelling of 520163389 in words is "five hundred twenty million, one hundred sixty-three thousand, three hundred eighty-nine".