498135985 has 4 divisors (see below), whose sum is σ = 597763188. Its totient is φ = 398508784.

The previous prime is 498135983. The next prime is 498136021. The reversal of 498135985 is 589531894.

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 357096609 + 141039376 = 18897^2 + 11876^2 .

It is a cyclic number.

It is not a de Polignac number, because 498135985 - 2¹ = 498135983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (498135983) 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 3 ways as a sum of consecutive naturals, for example, 49813594 + ... + 49813603.

It is an arithmetic number, because the mean of its divisors is an integer number (149440797).

Almost surely, 2^498135985 is an apocalyptic number.

It is an amenable number.

498135985 is a deficient number, since it is larger than the sum of its proper divisors (99627203).

498135985 is an equidigital number, since it uses as much as digits as its factorization.

498135985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99627202.

The product of its digits is 1555200, while the sum is 52.

The square root of 498135985 is about 22318.9602132357. The cubic root of 498135985 is about 792.7129846470.

The spelling of 498135985 in words is "four hundred ninety-eight million, one hundred thirty-five thousand, nine hundred eighty-five".