520109893 has 4 divisors (see below), whose sum is σ = 520611520. Its totient is φ = 519608268.

The previous prime is 520109801. The next prime is 520109911. The reversal of 520109893 is 398901025.

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 520109893 - 2¹⁷ = 519978821 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 (520109593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 249255 + ... + 251332.

It is an arithmetic number, because the mean of its divisors is an integer number (130152880).

Almost surely, 2^520109893 is an apocalyptic number.

It is an amenable number.

520109893 is a deficient number, since it is larger than the sum of its proper divisors (501627).

520109893 is a wasteful number, since it uses less digits than its factorization.

520109893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501626.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 520109893 is about 22805.9179381142. The cubic root of 520109893 is about 804.2017951144.

The spelling of 520109893 in words is "five hundred twenty million, one hundred nine thousand, eight hundred ninety-three".