499209649 has 3 divisors (see below), whose sum is σ = 499231993. Its totient is φ = 499187306.

The previous prime is 499209643. The next prime is 499209653. The reversal of 499209649 is 946902994.

The square root of 499209649 is 22343.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 946902994 = 2 ⋅473451497.

It is not a de Polignac number, because 499209649 - 2⁵ = 499209617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 499209596 and 499209605.

It is not an unprimeable number, because it can be changed into a prime (499209643) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11172 + ... + 33514.

Almost surely, 2^499209649 is an apocalyptic number.

499209649 is the 22343-rd square number.

499209649 is the 11172-nd centered octagonal number.

It is an amenable number.

499209649 is a deficient number, since it is larger than the sum of its proper divisors (22344).

499209649 is an frugal number, since it uses more digits than its factorization.

499209649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44686 (or 22343 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 52.

The cubic root of 499209649 is about 793.2821041036.

The spelling of 499209649 in words is "four hundred ninety-nine million, two hundred nine thousand, six hundred forty-nine".