499721171 has 18 divisors (see below), whose sum is σ = 539459172. Its totient is φ = 462808000.

The previous prime is 499721129. The next prime is 499721191. The reversal of 499721171 is 171127994.

It is not a de Polignac number, because 499721171 - 2⁶ = 499721107 is a prime.

It is a super-2 number, since 2×499721171² = 499442497491222482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499721191) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1990796 + ... + 1991046.

It is an arithmetic number, because the mean of its divisors is an integer number (29969954).

Almost surely, 2^499721171 is an apocalyptic number.

499721171 is a deficient number, since it is larger than the sum of its proper divisors (39738001).

499721171 is an equidigital number, since it uses as much as digits as its factorization.

499721171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 351 counting only the distinct ones).

The product of its digits is 31752, while the sum is 41.

The square root of 499721171 is about 22354.4440995521. Note that the first 3 decimals coincide. The cubic root of 499721171 is about 793.5529607344.

The spelling of 499721171 in words is "four hundred ninety-nine million, seven hundred twenty-one thousand, one hundred seventy-one".