55109693 has 2 divisors, whose sum is σ = 55109694. Its totient is φ = 55109692.

The previous prime is 55109653. The next prime is 55109701. The reversal of 55109693 is 39690155.

55109693 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39601849 + 15507844 = 6293^2 + 3938^2 .

It is a cyclic number.

It is not a de Polignac number, because 55109693 - 2⁶ = 55109629 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55109623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27554846 + 27554847.

It is an arithmetic number, because the mean of its divisors is an integer number (27554847).

Almost surely, 2^55109693 is an apocalyptic number.

It is an amenable number.

55109693 is a deficient number, since it is larger than the sum of its proper divisors (1).

55109693 is an equidigital number, since it uses as much as digits as its factorization.

55109693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36450, while the sum is 38.

The square root of 55109693 is about 7423.5903038894. The cubic root of 55109693 is about 380.5479007685.

The spelling of 55109693 in words is "fifty-five million, one hundred nine thousand, six hundred ninety-three".