99198173 has 2 divisors, whose sum is σ = 99198174. Its totient is φ = 99198172.

The previous prime is 99198163. The next prime is 99198193. The reversal of 99198173 is 37189199.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63712324 + 35485849 = 7982^2 + 5957^2 .

It is a cyclic number.

It is not a de Polignac number, because 99198173 - 2¹⁰ = 99197149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99198133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49599086 + 49599087.

It is an arithmetic number, because the mean of its divisors is an integer number (49599087).

Almost surely, 2^99198173 is an apocalyptic number.

It is an amenable number.

99198173 is a deficient number, since it is larger than the sum of its proper divisors (1).

99198173 is an equidigital number, since it uses as much as digits as its factorization.

99198173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 47.

The square root of 99198173 is about 9959.8279603616. The cubic root of 99198173 is about 462.9149689830.

The spelling of 99198173 in words is "ninety-nine million, one hundred ninety-eight thousand, one hundred seventy-three".