108372809 has 2 divisors, whose sum is σ = 108372810. Its totient is φ = 108372808.

The previous prime is 108372769. The next prime is 108372811. The reversal of 108372809 is 908273801.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100560784 + 7812025 = 10028^2 + 2795^2 .

It is an emirp because it is prime and its reverse (908273801) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-108372809 is a prime.

Together with 108372811, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (108372829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54186404 + 54186405.

It is an arithmetic number, because the mean of its divisors is an integer number (54186405).

Almost surely, 2^108372809 is an apocalyptic number.

It is an amenable number.

108372809 is a deficient number, since it is larger than the sum of its proper divisors (1).

108372809 is an equidigital number, since it uses as much as digits as its factorization.

108372809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 108372809 is about 10410.2261742961. The cubic root of 108372809 is about 476.7676468432.

The spelling of 108372809 in words is "one hundred eight million, three hundred seventy-two thousand, eight hundred nine".