520726173 has 16 divisors (see below), whose sum is σ = 775036416. Its totient is φ = 308251440.

The previous prime is 520726163. The next prime is 520726183. The reversal of 520726173 is 371627025.

It is an interprime number because it is at equal distance from previous prime (520726163) and next prime (520726183).

It is not a de Polignac number, because 520726173 - 2⁹ = 520725661 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520726163) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182065 + ... + 184902.

It is an arithmetic number, because the mean of its divisors is an integer number (48439776).

Almost surely, 2^520726173 is an apocalyptic number.

It is an amenable number.

520726173 is a deficient number, since it is larger than the sum of its proper divisors (254310243).

520726173 is a wasteful number, since it uses less digits than its factorization.

520726173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367024.

The product of its (nonzero) digits is 17640, while the sum is 33.

The square root of 520726173 is about 22819.4253433341. The cubic root of 520726173 is about 804.5193035656.

The spelling of 520726173 in words is "five hundred twenty million, seven hundred twenty-six thousand, one hundred seventy-three".