520981905 has 8 divisors (see below), whose sum is σ = 833571072. Its totient is φ = 277857008.

The previous prime is 520981889. The next prime is 520981921. The reversal of 520981905 is 509189025.

It is an interprime number because it is at equal distance from previous prime (520981889) and next prime (520981921).

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 520981905 - 2⁴ = 520981889 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17366049 + ... + 17366078.

It is an arithmetic number, because the mean of its divisors is an integer number (104196384).

Almost surely, 2^520981905 is an apocalyptic number.

It is an amenable number.

520981905 is a deficient number, since it is larger than the sum of its proper divisors (312589167).

520981905 is a wasteful number, since it uses less digits than its factorization.

520981905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34732135.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 520981905 is about 22825.0280394132. The cubic root of 520981905 is about 804.6509835605.

The spelling of 520981905 in words is "five hundred twenty million, nine hundred eighty-one thousand, nine hundred five".