99208991197 has 2 divisors, whose sum is σ = 99208991198. Its totient is φ = 99208991196.

The previous prime is 99208991053. The next prime is 99208991201. The reversal of 99208991197 is 79119980299.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68180520996 + 31028470201 = 261114^2 + 176149^2 .

It is a cyclic number.

It is not a de Polignac number, because 99208991197 - 2¹⁹ = 99208466909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99208991597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49604495598 + 49604495599.

It is an arithmetic number, because the mean of its divisors is an integer number (49604495599).

Almost surely, 2^99208991197 is an apocalyptic number.

It is an amenable number.

99208991197 is a deficient number, since it is larger than the sum of its proper divisors (1).

99208991197 is an equidigital number, since it uses as much as digits as its factorization.

99208991197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6613488, while the sum is 64.

The spelling of 99208991197 in words is "ninety-nine billion, two hundred eight million, nine hundred ninety-one thousand, one hundred ninety-seven".