498144721 has 4 divisors (see below), whose sum is σ = 507543732. Its totient is φ = 488745712.

The previous prime is 498144719. The next prime is 498144749. The reversal of 498144721 is 127441894.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 242144721 + 256000000 = 15561^2 + 16000^2 .

It is a cyclic number.

It is not a de Polignac number, because 498144721 - 2¹ = 498144719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (498144701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4699426 + ... + 4699531.

It is an arithmetic number, because the mean of its divisors is an integer number (126885933).

Almost surely, 2^498144721 is an apocalyptic number.

It is an amenable number.

498144721 is a deficient number, since it is larger than the sum of its proper divisors (9399011).

498144721 is an equidigital number, since it uses as much as digits as its factorization.

498144721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9399010.

The product of its digits is 64512, while the sum is 40.

The square root of 498144721 is about 22319.1559204196. The cubic root of 498144721 is about 792.7176186562.

The spelling of 498144721 in words is "four hundred ninety-eight million, one hundred forty-four thousand, seven hundred twenty-one".