99197915673 has 4 divisors (see below), whose sum is σ = 132263887568. Its totient is φ = 66131943780.

The previous prime is 99197915671. The next prime is 99197915699. The reversal of 99197915673 is 37651979199.

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, and also an emirpimes, since its reverse is a distinct semiprime: 37651979199 = 3 ⋅12550659733.

It is not a de Polignac number, because 99197915673 - 2¹ = 99197915671 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99197915671) 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, 16532985943 + ... + 16532985948.

It is an arithmetic number, because the mean of its divisors is an integer number (33065971892).

Almost surely, 2^99197915673 is an apocalyptic number.

It is an amenable number.

99197915673 is a deficient number, since it is larger than the sum of its proper divisors (33065971895).

99197915673 is a wasteful number, since it uses less digits than its factorization.

99197915673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33065971894.

The product of its digits is 28934010, while the sum is 66.

The spelling of 99197915673 in words is "ninety-nine billion, one hundred ninety-seven million, nine hundred fifteen thousand, six hundred seventy-three".