55409317 has 2 divisors, whose sum is σ = 55409318. Its totient is φ = 55409316.

The previous prime is 55409311. The next prime is 55409357. The reversal of 55409317 is 71390455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49999041 + 5410276 = 7071^2 + 2326^2 .

It is a cyclic number.

It is not a de Polignac number, because 55409317 - 2¹⁵ = 55376549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55409311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27704658 + 27704659.

It is an arithmetic number, because the mean of its divisors is an integer number (27704659).

Almost surely, 2^55409317 is an apocalyptic number.

It is an amenable number.

55409317 is a deficient number, since it is larger than the sum of its proper divisors (1).

55409317 is an equidigital number, since it uses as much as digits as its factorization.

55409317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 55409317 is about 7443.7434802658. The cubic root of 55409317 is about 381.2363172730.

The spelling of 55409317 in words is "fifty-five million, four hundred nine thousand, three hundred seventeen".