99511011 has 20 divisors (see below), whose sum is σ = 149584072. Its totient is φ = 65924928.

The previous prime is 99511003. The next prime is 99511021. The reversal of 99511011 is 11011599.

It is not a de Polignac number, because 99511011 - 2³ = 99511003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99511001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9435 + ... + 16971.

Almost surely, 2^99511011 is an apocalyptic number.

99511011 is a deficient number, since it is larger than the sum of its proper divisors (50073061).

99511011 is a wasteful number, since it uses less digits than its factorization.

99511011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7712 (or 7703 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 27.

The square root of 99511011 is about 9975.5205879192. The cubic root of 99511011 is about 463.4010848713.

The spelling of 99511011 in words is "ninety-nine million, five hundred eleven thousand, eleven".