499639023 has 20 divisors (see below), whose sum is σ = 803789448. Its totient is φ = 307469520.

The previous prime is 499638989. The next prime is 499639037. The reversal of 499639023 is 320936994.

499639023 is a `hidden beast` number, since 4 + 9 + 9 + 639 + 0 + 2 + 3 = 666.

It is not a de Polignac number, because 499639023 - 2⁹ = 499638511 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 499639023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499639073) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 236193 + ... + 238298.

Almost surely, 2^499639023 is an apocalyptic number.

499639023 is a deficient number, since it is larger than the sum of its proper divisors (304150425).

499639023 is a wasteful number, since it uses less digits than its factorization.

499639023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474516 (or 474507 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 499639023 is about 22352.6066265212. The cubic root of 499639023 is about 793.5094749102.

The spelling of 499639023 in words is "four hundred ninety-nine million, six hundred thirty-nine thousand, twenty-three".