520163387 has 2 divisors, whose sum is σ = 520163388. Its totient is φ = 520163386.

The previous prime is 520163383. The next prime is 520163419. The reversal of 520163387 is 783361025.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 520163387 - 2² = 520163383 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520163383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260081693 + 260081694.

It is an arithmetic number, because the mean of its divisors is an integer number (260081694).

Almost surely, 2^520163387 is an apocalyptic number.

520163387 is a deficient number, since it is larger than the sum of its proper divisors (1).

520163387 is an equidigital number, since it uses as much as digits as its factorization.

520163387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 520163387 is about 22807.0907175817. The cubic root of 520163387 is about 804.2293652470.

The spelling of 520163387 in words is "five hundred twenty million, one hundred sixty-three thousand, three hundred eighty-seven".