499921709 has 8 divisors (see below), whose sum is σ = 573513600. Its totient is φ = 426873456.

The previous prime is 499921661. The next prime is 499921759. The reversal of 499921709 is 907129994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499921709 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 (499921759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133934 + ... + 137615.

It is an arithmetic number, because the mean of its divisors is an integer number (71689200).

Almost surely, 2^499921709 is an apocalyptic number.

It is an amenable number.

499921709 is a deficient number, since it is larger than the sum of its proper divisors (73591891).

499921709 is a wasteful number, since it uses less digits than its factorization.

499921709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271819.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 499921709 is about 22358.9290664826. The cubic root of 499921709 is about 793.6590974164.

The spelling of 499921709 in words is "four hundred ninety-nine million, nine hundred twenty-one thousand, seven hundred nine".