498813981 has 8 divisors (see below), whose sum is σ = 673098720. Its totient is φ = 328535952.

The previous prime is 498813977. The next prime is 498814009. The reversal of 498813981 is 189318894.

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

It is not a de Polignac number, because 498813981 - 2² = 498813977 is a prime.

It is a super-2 number, since 2×498813981² = 497630775282136722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (498813911) 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, 1001386 + ... + 1001883.

It is an arithmetic number, because the mean of its divisors is an integer number (84137340).

Almost surely, 2^498813981 is an apocalyptic number.

It is an amenable number.

498813981 is a deficient number, since it is larger than the sum of its proper divisors (174284739).

498813981 is a wasteful number, since it uses less digits than its factorization.

498813981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2003355.

The product of its digits is 497664, while the sum is 51.

The square root of 498813981 is about 22334.1438385267. The cubic root of 498813981 is about 793.0724665256.

The spelling of 498813981 in words is "four hundred ninety-eight million, eight hundred thirteen thousand, nine hundred eighty-one".