109122905 has 4 divisors (see below), whose sum is σ = 130947492. Its totient is φ = 87298320.

The previous prime is 109122901. The next prime is 109122907. The reversal of 109122905 is 509221901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509221901 = 101 ⋅5041801.

It can be written as a sum of positive squares in 2 ways, for example, as 23541904 + 85581001 = 4852^2 + 9251^2 .

It is not a de Polignac number, because 109122905 - 2² = 109122901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109122901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10912286 + ... + 10912295.

It is an arithmetic number, because the mean of its divisors is an integer number (32736873).

Almost surely, 2^109122905 is an apocalyptic number.

It is an amenable number.

109122905 is a deficient number, since it is larger than the sum of its proper divisors (21824587).

109122905 is an equidigital number, since it uses as much as digits as its factorization.

109122905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21824586.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 109122905 is about 10446.1909325840. The cubic root of 109122905 is about 477.8650917983.

The spelling of 109122905 in words is "one hundred nine million, one hundred twenty-two thousand, nine hundred five".