499636405 has 4 divisors (see below), whose sum is σ = 599563692. Its totient is φ = 399709120.

The previous prime is 499636387. The next prime is 499636411. The reversal of 499636405 is 504636994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504636994 = 2 ⋅252318497.

It can be written as a sum of positive squares in 2 ways, for example, as 344733489 + 154902916 = 18567^2 + 12446^2 .

It is not a de Polignac number, because 499636405 - 2¹⁷ = 499505333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49963636 + ... + 49963645.

It is an arithmetic number, because the mean of its divisors is an integer number (149890923).

Almost surely, 2^499636405 is an apocalyptic number.

It is an amenable number.

499636405 is a deficient number, since it is larger than the sum of its proper divisors (99927287).

499636405 is an equidigital number, since it uses as much as digits as its factorization.

499636405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99927286.

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 499636405 is about 22352.5480650417. The cubic root of 499636405 is about 793.5080889686.

The spelling of 499636405 in words is "four hundred ninety-nine million, six hundred thirty-six thousand, four hundred five".