499998491 has 4 divisors (see below), whose sum is σ = 500500992. Its totient is φ = 499495992.

The previous prime is 499998487. The next prime is 499998493. The reversal of 499998491 is 194899994.

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

It is a cyclic number.

It is not a de Polignac number, because 499998491 - 2² = 499998487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499998493) 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 3 ways as a sum of consecutive naturals, for example, 249755 + ... + 251748.

It is an arithmetic number, because the mean of its divisors is an integer number (125125248).

Almost surely, 2^499998491 is an apocalyptic number.

499998491 is a deficient number, since it is larger than the sum of its proper divisors (502501).

499998491 is an equidigital number, since it uses as much as digits as its factorization.

499998491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502500.

The product of its digits is 7558272, while the sum is 62.

The square root of 499998491 is about 22360.6460327067. The cubic root of 499998491 is about 793.6997275206.

The spelling of 499998491 in words is "four hundred ninety-nine million, nine hundred ninety-eight thousand, four hundred ninety-one".