109128115 has 16 divisors (see below), whose sum is σ = 138247200. Its totient is φ = 82467072.

The previous prime is 109128079. The next prime is 109128119. The reversal of 109128115 is 511821901.

It is a cyclic number.

It is not a de Polignac number, because 109128115 - 2¹⁷ = 108997043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (109128119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35479 + ... + 38431.

It is an arithmetic number, because the mean of its divisors is an integer number (8640450).

Almost surely, 2^109128115 is an apocalyptic number.

109128115 is a deficient number, since it is larger than the sum of its proper divisors (29119085).

109128115 is a wasteful number, since it uses less digits than its factorization.

109128115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366.

The product of its (nonzero) digits is 720, while the sum is 28.

The square root of 109128115 is about 10446.4403028017. The cubic root of 109128115 is about 477.8726967935.

The spelling of 109128115 in words is "one hundred nine million, one hundred twenty-eight thousand, one hundred fifteen".