520020197 has 4 divisors (see below), whose sum is σ = 520156416. Its totient is φ = 519883980.

The previous prime is 520020161. The next prime is 520020223. The reversal of 520020197 is 791020025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 520020197 - 2¹⁰ = 520019173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520025197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62213 + ... + 70074.

It is an arithmetic number, because the mean of its divisors is an integer number (130039104).

Almost surely, 2^520020197 is an apocalyptic number.

It is an amenable number.

520020197 is a deficient number, since it is larger than the sum of its proper divisors (136219).

520020197 is a wasteful number, since it uses less digits than its factorization.

520020197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136218.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 520020197 is about 22803.9513462031. The cubic root of 520020197 is about 804.1555626854.

The spelling of 520020197 in words is "five hundred twenty million, twenty thousand, one hundred ninety-seven".