99609173 has 2 divisors, whose sum is σ = 99609174. Its totient is φ = 99609172.

The previous prime is 99609163. The next prime is 99609179. The reversal of 99609173 is 37190699.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99540529 + 68644 = 9977^2 + 262^2 .

It is a cyclic number.

It is not a de Polignac number, because 99609173 - 2⁶ = 99609109 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99609179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49804586 + 49804587.

It is an arithmetic number, because the mean of its divisors is an integer number (49804587).

Almost surely, 2^99609173 is an apocalyptic number.

It is an amenable number.

99609173 is a deficient number, since it is larger than the sum of its proper divisors (1).

99609173 is an equidigital number, since it uses as much as digits as its factorization.

99609173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 99609173 is about 9980.4395193799. The cubic root of 99609173 is about 463.5534078079.

The spelling of 99609173 in words is "ninety-nine million, six hundred nine thousand, one hundred seventy-three".