99997265197 has 2 divisors, whose sum is σ = 99997265198. Its totient is φ = 99997265196.

The previous prime is 99997265191. The next prime is 99997265231. The reversal of 99997265197 is 79156279999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59334139396 + 40663125801 = 243586^2 + 201651^2 .

It is a cyclic number.

It is not a de Polignac number, because 99997265197 - 2¹⁵ = 99997232429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99997265191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49998632598 + 49998632599.

It is an arithmetic number, because the mean of its divisors is an integer number (49998632599).

Almost surely, 2^99997265197 is an apocalyptic number.

It is an amenable number.

99997265197 is a deficient number, since it is larger than the sum of its proper divisors (1).

99997265197 is an equidigital number, since it uses as much as digits as its factorization.

99997265197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 173604060, while the sum is 73.

The spelling of 99997265197 in words is "ninety-nine billion, nine hundred ninety-seven million, two hundred sixty-five thousand, one hundred ninety-seven".