99911311 has 4 divisors (see below), whose sum is σ = 101034000. Its totient is φ = 98788624.

The previous prime is 99911309. The next prime is 99911327. The reversal of 99911311 is 11311999.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 99911311 - 2¹ = 99911309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99915311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 561211 + ... + 561388.

It is an arithmetic number, because the mean of its divisors is an integer number (25258500).

Almost surely, 2^99911311 is an apocalyptic number.

99911311 is a deficient number, since it is larger than the sum of its proper divisors (1122689).

99911311 is a wasteful number, since it uses less digits than its factorization.

99911311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122688.

The product of its digits is 2187, while the sum is 34.

The square root of 99911311 is about 9995.5645663464. The cubic root of 99911311 is about 464.0216234845.

The spelling of 99911311 in words is "ninety-nine million, nine hundred eleven thousand, three hundred eleven".