499799999 has 4 divisors (see below), whose sum is σ = 500697864. Its totient is φ = 498902136.

The previous prime is 499799987. The next prime is 499800001. The reversal of 499799999 is 999997994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999997994 = 2 ⋅499998997.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499799999 is a prime.

It is a Duffinian number.

499799999 is a modest number, since divided by 99999 gives 4997 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499799929) 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, 448097 + ... + 449210.

It is an arithmetic number, because the mean of its divisors is an integer number (125174466).

Almost surely, 2^499799999 is an apocalyptic number.

499799999 is a deficient number, since it is larger than the sum of its proper divisors (897865).

499799999 is an equidigital number, since it uses as much as digits as its factorization.

499799999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897864.

The product of its digits is 133923132, while the sum is 74.

The square root of 499799999 is about 22356.2071693747. The cubic root of 499799999 is about 793.5946846047.

The spelling of 499799999 in words is "four hundred ninety-nine million, seven hundred ninety-nine thousand, nine hundred ninety-nine".