520161329 has 2 divisors, whose sum is σ = 520161330. Its totient is φ = 520161328.

The previous prime is 520161319. The next prime is 520161377. The reversal of 520161329 is 923161025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 421357729 + 98803600 = 20527^2 + 9940^2 .

It is a cyclic number.

It is not a de Polignac number, because 520161329 - 2¹² = 520157233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520161319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260080664 + 260080665.

It is an arithmetic number, because the mean of its divisors is an integer number (260080665).

Almost surely, 2^520161329 is an apocalyptic number.

It is an amenable number.

520161329 is a deficient number, since it is larger than the sum of its proper divisors (1).

520161329 is an equidigital number, since it uses as much as digits as its factorization.

520161329 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 520161329 is about 22807.0455999895. The cubic root of 520161329 is about 804.2283046147.

The spelling of 520161329 in words is "five hundred twenty million, one hundred sixty-one thousand, three hundred twenty-nine".