99831801 has 4 divisors (see below), whose sum is σ = 133109072. Its totient is φ = 66554532.

The previous prime is 99831791. The next prime is 99831821. The reversal of 99831801 is 10813899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 99831801 - 2⁹ = 99831289 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99831801.

It is not an unprimeable number, because it can be changed into a prime (99831821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16638631 + ... + 16638636.

It is an arithmetic number, because the mean of its divisors is an integer number (33277268).

Almost surely, 2^99831801 is an apocalyptic number.

It is an amenable number.

99831801 is a deficient number, since it is larger than the sum of its proper divisors (33277271).

99831801 is a wasteful number, since it uses less digits than its factorization.

99831801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33277270.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 99831801 is about 9991.5865106599. The cubic root of 99831801 is about 463.8985004528.

The spelling of 99831801 in words is "ninety-nine million, eight hundred thirty-one thousand, eight hundred one".