99888869 has 2 divisors, whose sum is σ = 99888870. Its totient is φ = 99888868.

The previous prime is 99888857. The next prime is 99888881. The reversal of 99888869 is 96888899.

It is a balanced prime because it is at equal distance from previous prime (99888857) and next prime (99888881).

It can be written as a sum of positive squares in only one way, i.e., 98743969 + 1144900 = 9937^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 99888869 - 2¹⁶ = 99823333 is a prime.

It is a super-2 number, since 2×99888869² = 19955572300198322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99888809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49944434 + 49944435.

It is an arithmetic number, because the mean of its divisors is an integer number (49944435).

Almost surely, 2^99888869 is an apocalyptic number.

It is an amenable number.

99888869 is a deficient number, since it is larger than the sum of its proper divisors (1).

99888869 is an equidigital number, since it uses as much as digits as its factorization.

99888869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17915904, while the sum is 65.

The square root of 99888869 is about 9994.4419053792. The cubic root of 99888869 is about 463.9868781589.

The spelling of 99888869 in words is "ninety-nine million, eight hundred eighty-eight thousand, eight hundred sixty-nine".