499640497 has 4 divisors (see below), whose sum is σ = 508109040. Its totient is φ = 491171956.

The previous prime is 499640467. The next prime is 499640513. The reversal of 499640497 is 794046994.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-499640497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499640437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4234183 + ... + 4234300.

It is an arithmetic number, because the mean of its divisors is an integer number (127027260).

Almost surely, 2^499640497 is an apocalyptic number.

It is an amenable number.

499640497 is a deficient number, since it is larger than the sum of its proper divisors (8468543).

499640497 is an equidigital number, since it uses as much as digits as its factorization.

499640497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8468542.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 499640497 is about 22352.6395980430. The cubic root of 499640497 is about 793.5102552281.

The spelling of 499640497 in words is "four hundred ninety-nine million, six hundred forty thousand, four hundred ninety-seven".