99210197 has 2 divisors, whose sum is σ = 99210198. Its totient is φ = 99210196.

The previous prime is 99210193. The next prime is 99210233. The reversal of 99210197 is 79101299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96020401 + 3189796 = 9799^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 99210197 - 2² = 99210193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99210197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99210193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49605098 + 49605099.

It is an arithmetic number, because the mean of its divisors is an integer number (49605099).

Almost surely, 2^99210197 is an apocalyptic number.

It is an amenable number.

99210197 is a deficient number, since it is larger than the sum of its proper divisors (1).

99210197 is an equidigital number, since it uses as much as digits as its factorization.

99210197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 99210197 is about 9960.4315669553. The cubic root of 99210197 is about 462.9336718299.

The spelling of 99210197 in words is "ninety-nine million, two hundred ten thousand, one hundred ninety-seven".