99379921517 has 8 divisors (see below), whose sum is σ = 99625774080. Its totient is φ = 99134204400.

The previous prime is 99379921513. The next prime is 99379921523. The reversal of 99379921517 is 71512997399.

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 99379921517 - 2² = 99379921513 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99379921517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99379921513) 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, 1523267 + ... + 1587167.

It is an arithmetic number, because the mean of its divisors is an integer number (12453221760).

Almost surely, 2^99379921517 is an apocalyptic number.

It is an amenable number.

99379921517 is a deficient number, since it is larger than the sum of its proper divisors (245852563).

99379921517 is a wasteful number, since it uses less digits than its factorization.

99379921517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67723.

The product of its digits is 9644670, while the sum is 62.

The spelling of 99379921517 in words is "ninety-nine billion, three hundred seventy-nine million, nine hundred twenty-one thousand, five hundred seventeen".