99928111 has 4 divisors (see below), whose sum is σ = 102365424. Its totient is φ = 97490800.

The previous prime is 99928079. The next prime is 99928117. The reversal of 99928111 is 11182999.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11182999 = 193 ⋅57943.

It is a cyclic number.

It is not a de Polignac number, because 99928111 - 2⁵ = 99928079 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 (99928117) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1218595 + ... + 1218676.

It is an arithmetic number, because the mean of its divisors is an integer number (25591356).

Almost surely, 2^99928111 is an apocalyptic number.

99928111 is a deficient number, since it is larger than the sum of its proper divisors (2437313).

99928111 is a wasteful number, since it uses less digits than its factorization.

99928111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2437312.

The product of its digits is 11664, while the sum is 40.

The square root of 99928111 is about 9996.4049037642. The cubic root of 99928111 is about 464.0476303042.

The spelling of 99928111 in words is "ninety-nine million, nine hundred twenty-eight thousand, one hundred eleven".