99808501 has 16 divisors (see below), whose sum is σ = 113592640. Its totient is φ = 86935680.

The previous prime is 99808481. The next prime is 99808519. The reversal of 99808501 is 10580899.

It is not a de Polignac number, because 99808501 - 2⁵ = 99808469 is a prime.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76666 + ... + 77956.

It is an arithmetic number, because the mean of its divisors is an integer number (7099540).

Almost surely, 2^99808501 is an apocalyptic number.

It is an amenable number.

99808501 is a deficient number, since it is larger than the sum of its proper divisors (13784139).

99808501 is a wasteful number, since it uses less digits than its factorization.

99808501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1636.

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

The square root of 99808501 is about 9990.4204616222. The cubic root of 99808501 is about 463.8624074912.

It can be divided in two parts, 9980 and 8501, that added together give a palindrome (18481).

The spelling of 99808501 in words is "ninety-nine million, eight hundred eight thousand, five hundred one".