109128947 has 8 divisors (see below), whose sum is σ = 113110800. Its totient is φ = 105201504.

The previous prime is 109128931. The next prime is 109128991. The reversal of 109128947 is 749821901.

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 109128947 - 2⁴ = 109128931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109128847) 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, 9497 + ... + 17562.

It is an arithmetic number, because the mean of its divisors is an integer number (14138850).

Almost surely, 2^109128947 is an apocalyptic number.

109128947 is a deficient number, since it is larger than the sum of its proper divisors (3981853).

109128947 is a wasteful number, since it uses less digits than its factorization.

109128947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27205.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 109128947 is about 10446.4801249033. The cubic root of 109128947 is about 477.8739112348.

The spelling of 109128947 in words is "one hundred nine million, one hundred twenty-eight thousand, nine hundred forty-seven".