99319081 has 2 divisors, whose sum is σ = 99319082. Its totient is φ = 99319080.

The previous prime is 99319069. The next prime is 99319093. The reversal of 99319081 is 18091399.

It is a balanced prime because it is at equal distance from previous prime (99319069) and next prime (99319093).

It can be written as a sum of positive squares in only one way, i.e., 97693456 + 1625625 = 9884^2 + 1275^2 .

It is a cyclic number.

It is not a de Polignac number, because 99319081 - 2¹¹ = 99317033 is a prime.

It is a super-2 number, since 2×99319081² = 19728559701369122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99319481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49659540 + 49659541.

It is an arithmetic number, because the mean of its divisors is an integer number (49659541).

Almost surely, 2^99319081 is an apocalyptic number.

It is an amenable number.

99319081 is a deficient number, since it is larger than the sum of its proper divisors (1).

99319081 is an equidigital number, since it uses as much as digits as its factorization.

99319081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 99319081 is about 9965.8958955028. The cubic root of 99319081 is about 463.1029677367.

The spelling of 99319081 in words is "ninety-nine million, three hundred nineteen thousand, eighty-one".