99397698161 has 2 divisors, whose sum is σ = 99397698162. Its totient is φ = 99397698160.

The previous prime is 99397698139. The next prime is 99397698187. The reversal of 99397698161 is 16189679399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64284559936 + 35113138225 = 253544^2 + 187385^2 .

It is an emirp because it is prime and its reverse (16189679399) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99397698161 - 2¹⁴ = 99397681777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99397698091 and 99397698100.

It is not a weakly prime, because it can be changed into another prime (99397698761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49698849080 + 49698849081.

It is an arithmetic number, because the mean of its divisors is an integer number (49698849081).

Almost surely, 2^99397698161 is an apocalyptic number.

It is an amenable number.

99397698161 is a deficient number, since it is larger than the sum of its proper divisors (1).

99397698161 is an equidigital number, since it uses as much as digits as its factorization.

99397698161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39680928, while the sum is 68.

The spelling of 99397698161 in words is "ninety-nine billion, three hundred ninety-seven million, six hundred ninety-eight thousand, one hundred sixty-one".