520651673 has 4 divisors (see below), whose sum is σ = 551278260. Its totient is φ = 490025088.

The previous prime is 520651657. The next prime is 520651711. The reversal of 520651673 is 376156025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 287539849 + 233111824 = 16957^2 + 15268^2 .

It is a cyclic number.

It is not a de Polignac number, because 520651673 - 2⁴ = 520651657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520651073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15313268 + ... + 15313301.

It is an arithmetic number, because the mean of its divisors is an integer number (137819565).

Almost surely, 2^520651673 is an apocalyptic number.

It is an amenable number.

520651673 is a deficient number, since it is larger than the sum of its proper divisors (30626587).

520651673 is a wasteful number, since it uses less digits than its factorization.

520651673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30626586.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 520651673 is about 22817.7929037845. The cubic root of 520651673 is about 804.4809343613.

The spelling of 520651673 in words is "five hundred twenty million, six hundred fifty-one thousand, six hundred seventy-three".