99808541 has 8 divisors (see below), whose sum is σ = 116395200. Its totient is φ = 85549884.

The previous prime is 99808537. The next prime is 99808571. The reversal of 99808541 is 14580899.

It is not a de Polignac number, because 99808541 - 2² = 99808537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 99808492 and 99808501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99808531) 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 in 7 ways as a sum of consecutive naturals, for example, 145151 + ... + 145836.

It is an arithmetic number, because the mean of its divisors is an integer number (14549400).

Almost surely, 2^99808541 is an apocalyptic number.

It is an amenable number.

99808541 is a deficient number, since it is larger than the sum of its proper divisors (16586659).

99808541 is an equidigital number, since it uses as much as digits as its factorization.

99808541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291008 (or 290994 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 99808541 is about 9990.4224635398. The cubic root of 99808541 is about 463.8624694582.

The spelling of 99808541 in words is "ninety-nine million, eight hundred eight thousand, five hundred forty-one".