55387593 has 24 divisors (see below), whose sum is σ = 83421000. Its totient is φ = 35368704.

The previous prime is 55387583. The next prime is 55387613. The reversal of 55387593 is 39578355.

55387593 is a `hidden beast` number, since 5 + 53 + 8 + 7 + 593 = 666.

55387593 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7112889 + 48274704 = 2667^2 + 6948^2 .

It is not a de Polignac number, because 55387593 - 2⁹ = 55387081 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55387583) 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 in 23 ways as a sum of consecutive naturals, for example, 34983 + ... + 36531.

It is an arithmetic number, because the mean of its divisors is an integer number (3475875).

Almost surely, 2^55387593 is an apocalyptic number.

It is an amenable number.

55387593 is a deficient number, since it is larger than the sum of its proper divisors (28033407).

55387593 is a wasteful number, since it uses less digits than its factorization.

55387593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721 (or 1718 counting only the distinct ones).

The product of its digits is 567000, while the sum is 45.

The square root of 55387593 is about 7442.2841251863. The cubic root of 55387593 is about 381.1864877449.

It can be divided in two parts, 5538 and 7593, that added together give a palindrome (13131).

The spelling of 55387593 in words is "fifty-five million, three hundred eighty-seven thousand, five hundred ninety-three".