107805809 has 2 divisors, whose sum is σ = 107805810. Its totient is φ = 107805808.

The previous prime is 107805781. The next prime is 107805833. The reversal of 107805809 is 908508701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101949409 + 5856400 = 10097^2 + 2420^2 .

It is an emirp because it is prime and its reverse (908508701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 107805809 - 2⁸ = 107805553 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (107805409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53902904 + 53902905.

It is an arithmetic number, because the mean of its divisors is an integer number (53902905).

Almost surely, 2^107805809 is an apocalyptic number.

It is an amenable number.

107805809 is a deficient number, since it is larger than the sum of its proper divisors (1).

107805809 is an equidigital number, since it uses as much as digits as its factorization.

107805809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 107805809 is about 10382.9576229512. The cubic root of 107805809 is about 475.9347193506.

The spelling of 107805809 in words is "one hundred seven million, eight hundred five thousand, eight hundred nine".