499980999 has 16 divisors (see below), whose sum is σ = 806692608. Its totient is φ = 268897152.

The previous prime is 499980997. The next prime is 499981021. The reversal of 499980999 is 999089994.

It is a happy number.

It is not a de Polignac number, because 499980999 - 2¹ = 499980997 is a prime.

It is a super-2 number, since 2×499980999² = 499961998722076002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499980997) 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 15 ways as a sum of consecutive naturals, for example, 699897 + ... + 700610.

It is an arithmetic number, because the mean of its divisors is an integer number (50418288).

Almost surely, 2^499980999 is an apocalyptic number.

499980999 is a deficient number, since it is larger than the sum of its proper divisors (306711609).

499980999 is a wasteful number, since it uses less digits than its factorization.

499980999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400534.

The product of its (nonzero) digits is 17006112, while the sum is 66.

The square root of 499980999 is about 22360.2548956849. The cubic root of 499980999 is about 793.6904717876.

The spelling of 499980999 in words is "four hundred ninety-nine million, nine hundred eighty thousand, nine hundred ninety-nine".