99541168693 has 2 divisors, whose sum is σ = 99541168694. Its totient is φ = 99541168692.

The previous prime is 99541168651. The next prime is 99541168717. The reversal of 99541168693 is 39686114599.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93045131089 + 6496037604 = 305033^2 + 80598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99541168693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99541165693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49770584346 + 49770584347.

It is an arithmetic number, because the mean of its divisors is an integer number (49770584347).

Almost surely, 2^99541168693 is an apocalyptic number.

It is an amenable number.

99541168693 is a deficient number, since it is larger than the sum of its proper divisors (1).

99541168693 is an equidigital number, since it uses as much as digits as its factorization.

99541168693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 61.

The spelling of 99541168693 in words is "ninety-nine billion, five hundred forty-one million, one hundred sixty-eight thousand, six hundred ninety-three".