109988081 has 4 divisors (see below), whose sum is σ = 125700672. Its totient is φ = 94275492.

The previous prime is 109988057. The next prime is 109988101. The reversal of 109988081 is 180889901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 180889901 = 53 ⋅3413017.

It is a cyclic number.

It is not a de Polignac number, because 109988081 - 2¹⁰ = 109987057 is a prime.

It is a super-2 number, since 2×109988081² = 24194755924125122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109988041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7856285 + ... + 7856298.

It is an arithmetic number, because the mean of its divisors is an integer number (31425168).

Almost surely, 2^109988081 is an apocalyptic number.

It is an amenable number.

109988081 is a deficient number, since it is larger than the sum of its proper divisors (15712591).

109988081 is an equidigital number, since it uses as much as digits as its factorization.

109988081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15712590.

The product of its (nonzero) digits is 41472, while the sum is 44.

The square root of 109988081 is about 10487.5202502784. The cubic root of 109988081 is about 479.1246793438.

The spelling of 109988081 in words is "one hundred nine million, nine hundred eighty-eight thousand, eighty-one".