520729189 has 2 divisors, whose sum is σ = 520729190. Its totient is φ = 520729188.

The previous prime is 520729163. The next prime is 520729259. The reversal of 520729189 is 981927025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 519065089 + 1664100 = 22783^2 + 1290^2 .

It is a cyclic number.

It is not a de Polignac number, because 520729189 - 2²⁵ = 487174757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520729109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260364594 + 260364595.

It is an arithmetic number, because the mean of its divisors is an integer number (260364595).

Almost surely, 2^520729189 is an apocalyptic number.

It is an amenable number.

520729189 is a deficient number, since it is larger than the sum of its proper divisors (1).

520729189 is an equidigital number, since it uses as much as digits as its factorization.

520729189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 43.

The square root of 520729189 is about 22819.4914272865. The cubic root of 520729189 is about 804.5208567975.

The spelling of 520729189 in words is "five hundred twenty million, seven hundred twenty-nine thousand, one hundred eighty-nine".