55641787 has 2 divisors, whose sum is σ = 55641788. Its totient is φ = 55641786.

The previous prime is 55641767. The next prime is 55641791. The reversal of 55641787 is 78714655.

55641787 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 55641787 - 2⁷ = 55641659 is a prime.

It is not a weakly prime, because it can be changed into another prime (55641727) 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, 27820893 + 27820894.

It is an arithmetic number, because the mean of its divisors is an integer number (27820894).

Almost surely, 2^55641787 is an apocalyptic number.

55641787 is a deficient number, since it is larger than the sum of its proper divisors (1).

55641787 is an equidigital number, since it uses as much as digits as its factorization.

55641787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 43.

The square root of 55641787 is about 7459.3422632294. The cubic root of 55641787 is about 381.7687328544.

The spelling of 55641787 in words is "fifty-five million, six hundred forty-one thousand, seven hundred eighty-seven".