107788409 has 2 divisors, whose sum is σ = 107788410. Its totient is φ = 107788408.

The previous prime is 107788397. The next prime is 107788411. The reversal of 107788409 is 904887701.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100060009 + 7728400 = 10003^2 + 2780^2 .

It is an emirp because it is prime and its reverse (904887701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 107788409 - 2²⁰ = 106739833 is a prime.

It is a super-2 number, since 2×107788409² = 23236682229502562, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 107788411, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 107788409.

It is not a weakly prime, because it can be changed into another prime (107788459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53894204 + 53894205.

It is an arithmetic number, because the mean of its divisors is an integer number (53894205).

Almost surely, 2^107788409 is an apocalyptic number.

It is an amenable number.

107788409 is a deficient number, since it is larger than the sum of its proper divisors (1).

107788409 is an equidigital number, since it uses as much as digits as its factorization.

107788409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 107788409 is about 10382.1196775996. The cubic root of 107788409 is about 475.9091124754.

The spelling of 107788409 in words is "one hundred seven million, seven hundred eighty-eight thousand, four hundred nine".