521968998 has 8 divisors (see below), whose sum is σ = 1043938008. Its totient is φ = 173989664.

The previous prime is 521968939. The next prime is 521969017. The reversal of 521968998 is 899869125.

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

521968998 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43497411 + ... + 43497422.

It is an arithmetic number, because the mean of its divisors is an integer number (130492251).

Almost surely, 2^521968998 is an apocalyptic number.

521968998 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521968998 is a wasteful number, since it uses less digits than its factorization.

521968998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86994838.

The product of its digits is 2799360, while the sum is 57.

The square root of 521968998 is about 22846.6408471793. The cubic root of 521968998 is about 805.1588478115.

The spelling of 521968998 in words is "five hundred twenty-one million, nine hundred sixty-eight thousand, nine hundred ninety-eight".