99897571619 has 4 divisors (see below), whose sum is σ = 99898242096. Its totient is φ = 99896901144.

The previous prime is 99897571607. The next prime is 99897571637. The reversal of 99897571619 is 91617579899.

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.

It is a cyclic number.

It is not a de Polignac number, because 99897571619 - 2²⁰ = 99896523043 is a prime.

It is a super-2 number, since 2×99897571619² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99897571219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2 + ... + 446984.

It is an arithmetic number, because the mean of its divisors is an integer number (24974560524).

Almost surely, 2^99897571619 is an apocalyptic number.

99897571619 is a deficient number, since it is larger than the sum of its proper divisors (670477).

99897571619 is a wasteful number, since it uses less digits than its factorization.

99897571619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670476.

The product of its digits is 77157360, while the sum is 71.

The spelling of 99897571619 in words is "ninety-nine billion, eight hundred ninety-seven million, five hundred seventy-one thousand, six hundred nineteen".