99988771 has 2 divisors, whose sum is σ = 99988772. Its totient is φ = 99988770.

The previous prime is 99988753. The next prime is 99988807. The reversal of 99988771 is 17788999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99988771 - 2¹¹ = 99986723 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99988571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49994385 + 49994386.

It is an arithmetic number, because the mean of its divisors is an integer number (49994386).

Almost surely, 2^99988771 is an apocalyptic number.

99988771 is a deficient number, since it is larger than the sum of its proper divisors (1).

99988771 is an equidigital number, since it uses as much as digits as its factorization.

99988771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 58.

The square root of 99988771 is about 9999.4385342378. The cubic root of 99988771 is about 464.1415092439.

It can be divided in two parts, 9998 and 8771, that added together give a square (18769 = 137²).

The spelling of 99988771 in words is "ninety-nine million, nine hundred eighty-eight thousand, seven hundred seventy-one".