109126139 has 4 divisors (see below), whose sum is σ = 114869640. Its totient is φ = 103382640.

The previous prime is 109126123. The next prime is 109126141. The reversal of 109126139 is 931621901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931621901 = 7 ⋅133088843.

It is a cyclic number.

It is not a de Polignac number, because 109126139 - 2⁴ = 109126123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (109126439) 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 3 ways as a sum of consecutive naturals, for example, 2871722 + ... + 2871759.

It is an arithmetic number, because the mean of its divisors is an integer number (28717410).

Almost surely, 2^109126139 is an apocalyptic number.

109126139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

109126139 is a deficient number, since it is larger than the sum of its proper divisors (5743501).

109126139 is an equidigital number, since it uses as much as digits as its factorization.

109126139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5743500.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 109126139 is about 10446.3457247020. The cubic root of 109126139 is about 477.8698124707.

The spelling of 109126139 in words is "one hundred nine million, one hundred twenty-six thousand, one hundred thirty-nine".