109987129 has 8 divisors (see below), whose sum is σ = 127422080. Its totient is φ = 92982816.

The previous prime is 109987123. The next prime is 109987139. The reversal of 109987129 is 921789901.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 109987129 - 2³ = 109987121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109987121) 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 7 ways as a sum of consecutive naturals, for example, 107109 + ... + 108130.

It is an arithmetic number, because the mean of its divisors is an integer number (15927760).

Almost surely, 2^109987129 is an apocalyptic number.

It is an amenable number.

109987129 is a deficient number, since it is larger than the sum of its proper divisors (17434951).

109987129 is an equidigital number, since it uses as much as digits as its factorization.

109987129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215319.

The product of its (nonzero) digits is 81648, while the sum is 46.

The square root of 109987129 is about 10487.4748629019. The cubic root of 109987129 is about 479.1232969880.

The spelling of 109987129 in words is "one hundred nine million, nine hundred eighty-seven thousand, one hundred twenty-nine".