109185975 has 48 divisors (see below), whose sum is σ = 203156640. Its totient is φ = 58203360.

The previous prime is 109185971. The next prime is 109186031. The reversal of 109185975 is 579581901.

It is not a de Polignac number, because 109185975 - 2² = 109185971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 109185975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109185971) 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 47 ways as a sum of consecutive naturals, for example, 53677 + ... + 55673.

It is an arithmetic number, because the mean of its divisors is an integer number (4232430).

Almost surely, 2^109185975 is an apocalyptic number.

109185975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

109185975 is a deficient number, since it is larger than the sum of its proper divisors (93970665).

109185975 is an frugal number, since it uses more digits than its factorization.

109185975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2028 (or 2005 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 45.

The square root of 109185975 is about 10449.2093002294. The cubic root of 109185975 is about 477.9571383053.

The spelling of 109185975 in words is "one hundred nine million, one hundred eighty-five thousand, nine hundred seventy-five".