99888888893 has 2 divisors, whose sum is σ = 99888888894. Its totient is φ = 99888888892.

The previous prime is 99888888859. The next prime is 99888888899. The reversal of 99888888893 is 39888888899.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77967717529 + 21921171364 = 279227^2 + 148058^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99888888893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99888888899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49944444446 + 49944444447.

It is an arithmetic number, because the mean of its divisors is an integer number (49944444447).

Almost surely, 2^99888888893 is an apocalyptic number.

It is an amenable number.

99888888893 is a deficient number, since it is larger than the sum of its proper divisors (1).

99888888893 is an equidigital number, since it uses as much as digits as its factorization.

99888888893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4586471424, while the sum is 86.

The spelling of 99888888893 in words is "ninety-nine billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred ninety-three".