99395172893 has 2 divisors, whose sum is σ = 99395172894. Its totient is φ = 99395172892.

The previous prime is 99395172857. The next prime is 99395172901. The reversal of 99395172893 is 39827159399.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80368281049 + 19026891844 = 283493^2 + 137938^2 .

It is a cyclic number.

It is not a de Polignac number, because 99395172893 - 2⁶ = 99395172829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99395172193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49697586446 + 49697586447.

It is an arithmetic number, because the mean of its divisors is an integer number (49697586447).

Almost surely, 2^99395172893 is an apocalyptic number.

It is an amenable number.

99395172893 is a deficient number, since it is larger than the sum of its proper divisors (1).

99395172893 is an equidigital number, since it uses as much as digits as its factorization.

99395172893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33067440, while the sum is 65.

The spelling of 99395172893 in words is "ninety-nine billion, three hundred ninety-five million, one hundred seventy-two thousand, eight hundred ninety-three".