99809211 has 8 divisors (see below), whose sum is σ = 136324944. Its totient is φ = 64916480.

The previous prime is 99809207. The next prime is 99809219. The reversal of 99809211 is 11290899.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99809211 - 2² = 99809207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99809211.

It is not an unprimeable number, because it can be changed into a prime (99809219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405606 + ... + 405851.

It is an arithmetic number, because the mean of its divisors is an integer number (17040618).

Almost surely, 2^99809211 is an apocalyptic number.

99809211 is a deficient number, since it is larger than the sum of its proper divisors (36515733).

99809211 is a wasteful number, since it uses less digits than its factorization.

99809211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811501.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 99809211 is about 9990.4559955990. The cubic root of 99809211 is about 463.8635074026.

It can be divided in two parts, 9980 and 9211, that added together give a palindrome (19191).

The spelling of 99809211 in words is "ninety-nine million, eight hundred nine thousand, two hundred eleven".