109139069 has 4 divisors (see below), whose sum is σ = 117534396. Its totient is φ = 100743744.

The previous prime is 109139057. The next prime is 109139077. The reversal of 109139069 is 960931901.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 960931901 = 109 ⋅8815889.

It can be written as a sum of positive squares in 2 ways, for example, as 73736569 + 35402500 = 8587^2 + 5950^2 .

It is a cyclic number.

It is not a de Polignac number, because 109139069 - 2¹⁶ = 109073533 is a prime.

It is a super-2 number, since 2×109139069² = 23822672764373522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109139039) 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, 4197644 + ... + 4197669.

It is an arithmetic number, because the mean of its divisors is an integer number (29383599).

Almost surely, 2^109139069 is an apocalyptic number.

It is an amenable number.

109139069 is a deficient number, since it is larger than the sum of its proper divisors (8395327).

109139069 is an equidigital number, since it uses as much as digits as its factorization.

109139069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8395326.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 109139069 is about 10446.9645830739. The cubic root of 109139069 is about 477.8886854700. Note that the first 3 decimals are identical.

The spelling of 109139069 in words is "one hundred nine million, one hundred thirty-nine thousand, sixty-nine".