498531721 has 8 divisors (see below), whose sum is σ = 516043080. Its totient is φ = 481041792.

The previous prime is 498531713. The next prime is 498531731. The reversal of 498531721 is 127135894.

It can be written as a sum of positive squares in 4 ways, for example, as 140754496 + 357777225 = 11864^2 + 18915^2 .

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

It is not a de Polignac number, because 498531721 - 2³ = 498531713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (498531731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52861 + ... + 61573.

It is an arithmetic number, because the mean of its divisors is an integer number (64505385).

Almost surely, 2^498531721 is an apocalyptic number.

It is an amenable number.

498531721 is a deficient number, since it is larger than the sum of its proper divisors (17511359).

498531721 is a wasteful number, since it uses less digits than its factorization.

498531721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10715.

The product of its digits is 60480, while the sum is 40.

The square root of 498531721 is about 22327.8239199435. The cubic root of 498531721 is about 792.9228483784.

The spelling of 498531721 in words is "four hundred ninety-eight million, five hundred thirty-one thousand, seven hundred twenty-one".