520190209 has 8 divisors (see below), whose sum is σ = 648548928. Its totient is φ = 405342960.

The previous prime is 520190201. The next prime is 520190243. The reversal of 520190209 is 902091025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520190209 - 2³ = 520190201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520190201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3377782 + ... + 3377935.

It is an arithmetic number, because the mean of its divisors is an integer number (81068616).

Almost surely, 2^520190209 is an apocalyptic number.

It is an amenable number.

520190209 is a deficient number, since it is larger than the sum of its proper divisors (128358719).

520190209 is a wasteful number, since it uses less digits than its factorization.

520190209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6755735.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 520190209 is about 22807.6787288843. The cubic root of 520190209 is about 804.2431882558.

The spelling of 520190209 in words is "five hundred twenty million, one hundred ninety thousand, two hundred nine".