813984997499 has 8 divisors (see below), whose sum is σ = 836845581168. Its totient is φ = 791169729120.

The previous prime is 813984997417. The next prime is 813984997517. The reversal of 813984997499 is 994799489318.

813984997499 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 813984997499 - 2¹² = 813984993403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813984927499) 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, 11292392 + ... + 11364245.

It is an arithmetic number, because the mean of its divisors is an integer number (104605697646).

Almost surely, 2^813984997499 is an apocalyptic number.

813984997499 is a deficient number, since it is larger than the sum of its proper divisors (22860583669).

813984997499 is a wasteful number, since it uses less digits than its factorization.

813984997499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22657645.

The product of its digits is 1269789696, while the sum is 80.

The spelling of 813984997499 in words is "eight hundred thirteen billion, nine hundred eighty-four million, nine hundred ninety-seven thousand, four hundred ninety-nine".