498971721 has 8 divisors (see below), whose sum is σ = 666799200. Its totient is φ = 331896032.

The previous prime is 498971687. The next prime is 498971723. The reversal of 498971721 is 127179894.

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 498971721 - 2⁶ = 498971657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (498971723) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 186396 + ... + 189053.

It is an arithmetic number, because the mean of its divisors is an integer number (83349900).

Almost surely, 2^498971721 is an apocalyptic number.

It is an amenable number.

498971721 is a deficient number, since it is larger than the sum of its proper divisors (167827479).

498971721 is a wasteful number, since it uses less digits than its factorization.

498971721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375895.

The product of its digits is 254016, while the sum is 48.

The square root of 498971721 is about 22337.6749237695. The cubic root of 498971721 is about 793.1560555129.

The spelling of 498971721 in words is "four hundred ninety-eight million, nine hundred seventy-one thousand, seven hundred twenty-one".