55716109 has 2 divisors, whose sum is σ = 55716110. Its totient is φ = 55716108.

The previous prime is 55716107. The next prime is 55716127. The reversal of 55716109 is 90161755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49070025 + 6646084 = 7005^2 + 2578^2 .

It is a cyclic number.

It is not a de Polignac number, because 55716109 - 2¹ = 55716107 is a prime.

Together with 55716107, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55716107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27858054 + 27858055.

It is an arithmetic number, because the mean of its divisors is an integer number (27858055).

Almost surely, 2^55716109 is an apocalyptic number.

It is an amenable number.

55716109 is a deficient number, since it is larger than the sum of its proper divisors (1).

55716109 is an equidigital number, since it uses as much as digits as its factorization.

55716109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 55716109 is about 7464.3224072919. The cubic root of 55716109 is about 381.9386362878.

The spelling of 55716109 in words is "fifty-five million, seven hundred sixteen thousand, one hundred nine".