55808647 has 2 divisors, whose sum is σ = 55808648. Its totient is φ = 55808646.

The previous prime is 55808581. The next prime is 55808653. The reversal of 55808647 is 74680855.

55808647 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 is a cyclic number.

It is not a de Polignac number, because 55808647 - 2¹⁵ = 55775879 is a prime.

It is a super-2 number, since 2×55808647² = 6229210159941218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55808677) 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, 27904323 + 27904324.

It is an arithmetic number, because the mean of its divisors is an integer number (27904324).

Almost surely, 2^55808647 is an apocalyptic number.

55808647 is a deficient number, since it is larger than the sum of its proper divisors (1).

55808647 is an equidigital number, since it uses as much as digits as its factorization.

55808647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 55808647 is about 7470.5185228336. The cubic root of 55808647 is about 382.1499712670.

The spelling of 55808647 in words is "fifty-five million, eight hundred eight thousand, six hundred forty-seven".