499986709 has 16 divisors (see below), whose sum is σ = 533332800. Its totient is φ = 467945856.

The previous prime is 499986667. The next prime is 499986713. The reversal of 499986709 is 907689994.

499986709 = 2581² + 2582² + ... + 2653².

It is not a de Polignac number, because 499986709 - 2²³ = 491598101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499980709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122902 + ... + 126904.

It is an arithmetic number, because the mean of its divisors is an integer number (33333300).

Almost surely, 2^499986709 is an apocalyptic number.

It is an amenable number.

499986709 is a deficient number, since it is larger than the sum of its proper divisors (33346091).

499986709 is a wasteful number, since it uses less digits than its factorization.

499986709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4164.

The product of its (nonzero) digits is 8817984, while the sum is 61.

The square root of 499986709 is about 22360.3825772280. The cubic root of 499986709 is about 793.6934932060.

The spelling of 499986709 in words is "four hundred ninety-nine million, nine hundred eighty-six thousand, seven hundred nine".