497699899921 has 4 divisors (see below), whose sum is σ = 568799885632. Its totient is φ = 426599914212.

The previous prime is 497699899919. The next prime is 497699899969. The reversal of 497699899921 is 129998996794.

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 not a de Polignac number, because 497699899921 - 2¹ = 497699899919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (497699899981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35549992845 + ... + 35549992858.

It is an arithmetic number, because the mean of its divisors is an integer number (142199971408).

Almost surely, 2^497699899921 is an apocalyptic number.

It is an amenable number.

497699899921 is a deficient number, since it is larger than the sum of its proper divisors (71099985711).

497699899921 is an equidigital number, since it uses as much as digits as its factorization.

497699899921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71099985710.

The product of its digits is 1428513408, while the sum is 82.

The spelling of 497699899921 in words is "four hundred ninety-seven billion, six hundred ninety-nine million, eight hundred ninety-nine thousand, nine hundred twenty-one".