99906197 has 2 divisors, whose sum is σ = 99906198. Its totient is φ = 99906196.

The previous prime is 99906193. The next prime is 99906203. The reversal of 99906197 is 79160999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67256401 + 32649796 = 8201^2 + 5714^2 .

It is a cyclic number.

It is not a de Polignac number, because 99906197 - 2² = 99906193 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99906193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49953098 + 49953099.

It is an arithmetic number, because the mean of its divisors is an integer number (49953099).

Almost surely, 2^99906197 is an apocalyptic number.

It is an amenable number.

99906197 is a deficient number, since it is larger than the sum of its proper divisors (1).

99906197 is an equidigital number, since it uses as much as digits as its factorization.

99906197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 50.

The square root of 99906197 is about 9995.3087496085. The cubic root of 99906197 is about 464.0137063059.

The spelling of 99906197 in words is "ninety-nine million, nine hundred six thousand, one hundred ninety-seven".