99011811 has 4 divisors (see below), whose sum is σ = 132015752. Its totient is φ = 66007872.

The previous prime is 99011797. The next prime is 99011813. The reversal of 99011811 is 11811099.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-99011811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99011813) 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, 16501966 + ... + 16501971.

It is an arithmetic number, because the mean of its divisors is an integer number (33003938).

Almost surely, 2^99011811 is an apocalyptic number.

99011811 is a deficient number, since it is larger than the sum of its proper divisors (33003941).

99011811 is a wasteful number, since it uses less digits than its factorization.

99011811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33003940.

The product of its (nonzero) digits is 648, while the sum is 30.

The square root of 99011811 is about 9950.4678784467. The cubic root of 99011811 is about 462.6248969725.

The spelling of 99011811 in words is "ninety-nine million, eleven thousand, eight hundred eleven".