108609791 has 2 divisors, whose sum is σ = 108609792. Its totient is φ = 108609790.

The previous prime is 108609713. The next prime is 108609797. The reversal of 108609791 is 197906801.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108609791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108609797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54304895 + 54304896.

It is an arithmetic number, because the mean of its divisors is an integer number (54304896).

Almost surely, 2^108609791 is an apocalyptic number.

108609791 is a deficient number, since it is larger than the sum of its proper divisors (1).

108609791 is an equidigital number, since it uses as much as digits as its factorization.

108609791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 108609791 is about 10421.6021321100. The cubic root of 108609791 is about 477.1149144382.

The spelling of 108609791 in words is "one hundred eight million, six hundred nine thousand, seven hundred ninety-one".