109569139 has 2 divisors, whose sum is σ = 109569140. Its totient is φ = 109569138.

The previous prime is 109569137. The next prime is 109569149. The reversal of 109569139 is 931965901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 109569139 - 2¹ = 109569137 is a prime.

Together with 109569137, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 109569095 and 109569104.

It is not a weakly prime, because it can be changed into another prime (109569133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54784569 + 54784570.

It is an arithmetic number, because the mean of its divisors is an integer number (54784570).

Almost surely, 2^109569139 is an apocalyptic number.

109569139 is a deficient number, since it is larger than the sum of its proper divisors (1).

109569139 is an equidigital number, since it uses as much as digits as its factorization.

109569139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 43.

The square root of 109569139 is about 10467.5278361225. The cubic root of 109569139 is about 478.5155804818.

The spelling of 109569139 in words is "one hundred nine million, five hundred sixty-nine thousand, one hundred thirty-nine".