520831669 has 8 divisors (see below), whose sum is σ = 559700928. Its totient is φ = 482877120.

The previous prime is 520831639. The next prime is 520831673. The reversal of 520831669 is 966138025.

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

It is a cyclic number.

It is not a de Polignac number, because 520831669 - 2⁵ = 520831637 is a prime.

It is a super-2 number, since 2×520831669² = 542531254866651122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520831639) 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, 227497 + ... + 229774.

It is an arithmetic number, because the mean of its divisors is an integer number (69962616).

Almost surely, 2^520831669 is an apocalyptic number.

It is an amenable number.

520831669 is a deficient number, since it is larger than the sum of its proper divisors (38869259).

520831669 is a wasteful number, since it uses less digits than its factorization.

520831669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457355.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 520831669 is about 22821.7367656364. The cubic root of 520831669 is about 804.5736301592.

The spelling of 520831669 in words is "five hundred twenty million, eight hundred thirty-one thousand, six hundred sixty-nine".