99663173 has 2 divisors, whose sum is σ = 99663174. Its totient is φ = 99663172.

The previous prime is 99663167. The next prime is 99663191. The reversal of 99663173 is 37136699.

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., 97160449 + 2502724 = 9857^2 + 1582^2 .

It is a cyclic number.

It is not a de Polignac number, because 99663173 - 2²⁰ = 98614597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99663133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49831586 + 49831587.

It is an arithmetic number, because the mean of its divisors is an integer number (49831587).

Almost surely, 2^99663173 is an apocalyptic number.

It is an amenable number.

99663173 is a deficient number, since it is larger than the sum of its proper divisors (1).

99663173 is an equidigital number, since it uses as much as digits as its factorization.

99663173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 44.

The square root of 99663173 is about 9983.1444445125. The cubic root of 99663173 is about 463.6371596727.

The spelling of 99663173 in words is "ninety-nine million, six hundred sixty-three thousand, one hundred seventy-three".