99850081 has 2 divisors, whose sum is σ = 99850082. Its totient is φ = 99850080.

The previous prime is 99850019. The next prime is 99850099. The reversal of 99850081 is 18005899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88661056 + 11189025 = 9416^2 + 3345^2 .

It is an emirp because it is prime and its reverse (18005899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99850081 is a prime.

It is a super-2 number, since 2×99850081² = 19940077351413122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99850001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49925040 + 49925041.

It is an arithmetic number, because the mean of its divisors is an integer number (49925041).

Almost surely, 2^99850081 is an apocalyptic number.

It is an amenable number.

99850081 is a deficient number, since it is larger than the sum of its proper divisors (1).

99850081 is an equidigital number, since it uses as much as digits as its factorization.

99850081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 99850081 is about 9992.5012384287. The cubic root of 99850081 is about 463.9268132314.

The spelling of 99850081 in words is "ninety-nine million, eight hundred fifty thousand, eighty-one".