55109729 has 2 divisors, whose sum is σ = 55109730. Its totient is φ = 55109728.

The previous prime is 55109713. The next prime is 55109737. The reversal of 55109729 is 92790155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54390625 + 719104 = 7375^2 + 848^2 .

It is a cyclic number.

It is not a de Polignac number, because 55109729 - 2⁴ = 55109713 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55109692 and 55109701.

It is not a weakly prime, because it can be changed into another prime (55109749) 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, 27554864 + 27554865.

It is an arithmetic number, because the mean of its divisors is an integer number (27554865).

Almost surely, 2^55109729 is an apocalyptic number.

It is an amenable number.

55109729 is a deficient number, since it is larger than the sum of its proper divisors (1).

55109729 is an equidigital number, since it uses as much as digits as its factorization.

55109729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28350, while the sum is 38.

The square root of 55109729 is about 7423.5927285917. The cubic root of 55109729 is about 380.5479836319.

The spelling of 55109729 in words is "fifty-five million, one hundred nine thousand, seven hundred twenty-nine".