99110681 has 2 divisors, whose sum is σ = 99110682. Its totient is φ = 99110680.

The previous prime is 99110677. The next prime is 99110699. The reversal of 99110681 is 18601199.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59923081 + 39187600 = 7741^2 + 6260^2 .

It is a cyclic number.

It is not a de Polignac number, because 99110681 - 2² = 99110677 is a prime.

It is a super-2 number, since 2×99110681² = 19645854176567522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (99110281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49555340 + 49555341.

It is an arithmetic number, because the mean of its divisors is an integer number (49555341).

Almost surely, 2^99110681 is an apocalyptic number.

It is an amenable number.

99110681 is a deficient number, since it is larger than the sum of its proper divisors (1).

99110681 is an equidigital number, since it uses as much as digits as its factorization.

99110681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 35.

The square root of 99110681 is about 9955.4347469109. The cubic root of 99110681 is about 462.7788331774.

The spelling of 99110681 in words is "ninety-nine million, one hundred ten thousand, six hundred eighty-one".