54565993 has 2 divisors, whose sum is σ = 54565994. Its totient is φ = 54565992.

The previous prime is 54565969. The next prime is 54565997. The reversal of 54565993 is 39956545.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54051904 + 514089 = 7352^2 + 717^2 .

It is a cyclic number.

It is not a de Polignac number, because 54565993 - 2⁹ = 54565481 is a prime.

It is not a weakly prime, because it can be changed into another prime (54565997) 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, 27282996 + 27282997.

It is an arithmetic number, because the mean of its divisors is an integer number (27282997).

Almost surely, 2^54565993 is an apocalyptic number.

It is an amenable number.

54565993 is a deficient number, since it is larger than the sum of its proper divisors (1).

54565993 is an equidigital number, since it uses as much as digits as its factorization.

54565993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 729000, while the sum is 46.

The square root of 54565993 is about 7386.8797878401. The cubic root of 54565993 is about 379.2922954532.

It can be divided in two parts, 5456 and 5993, that added together give a square (11449 = 107²).

The spelling of 54565993 in words is "fifty-four million, five hundred sixty-five thousand, nine hundred ninety-three".