109387909 has 2 divisors, whose sum is σ = 109387910. Its totient is φ = 109387908.

The previous prime is 109387777. The next prime is 109387939. The reversal of 109387909 is 909783901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69255684 + 40132225 = 8322^2 + 6335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-109387909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (109387939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54693954 + 54693955.

It is an arithmetic number, because the mean of its divisors is an integer number (54693955).

Almost surely, 2^109387909 is an apocalyptic number.

It is an amenable number.

109387909 is a deficient number, since it is larger than the sum of its proper divisors (1).

109387909 is an equidigital number, since it uses as much as digits as its factorization.

109387909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 46.

The square root of 109387909 is about 10458.8674817114. The cubic root of 109387909 is about 478.2516094510.

The spelling of 109387909 in words is "one hundred nine million, three hundred eighty-seven thousand, nine hundred nine".