499686905 has 4 divisors (see below), whose sum is σ = 599624292. Its totient is φ = 399749520.

The previous prime is 499686877. The next prime is 499686911. The reversal of 499686905 is 509686994.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509686994 = 2 ⋅254843497.

It can be written as a sum of positive squares in 2 ways, for example, as 366607609 + 133079296 = 19147^2 + 11536^2 .

It is not a de Polignac number, because 499686905 - 2⁶ = 499686841 is a prime.

It is a Duffinian 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, 49968686 + ... + 49968695.

It is an arithmetic number, because the mean of its divisors is an integer number (149906073).

Almost surely, 2^499686905 is an apocalyptic number.

It is an amenable number.

499686905 is a deficient number, since it is larger than the sum of its proper divisors (99937387).

499686905 is an equidigital number, since it uses as much as digits as its factorization.

499686905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99937386.

The product of its (nonzero) digits is 4199040, while the sum is 56.

The square root of 499686905 is about 22353.6776616287. The cubic root of 499686905 is about 793.5348222812.

The spelling of 499686905 in words is "four hundred ninety-nine million, six hundred eighty-six thousand, nine hundred five".