55706593 has 4 divisors (see below), whose sum is σ = 57627540. Its totient is φ = 53785648.

The previous prime is 55706587. The next prime is 55706641. The reversal of 55706593 is 39560755.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24088464 + 31618129 = 4908^2 + 5623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55706593 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55706503) 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 in 3 ways as a sum of consecutive naturals, for example, 960430 + ... + 960487.

It is an arithmetic number, because the mean of its divisors is an integer number (14406885).

Almost surely, 2^55706593 is an apocalyptic number.

It is an amenable number.

55706593 is a deficient number, since it is larger than the sum of its proper divisors (1920947).

55706593 is a wasteful number, since it uses less digits than its factorization.

55706593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1920946.

The product of its (nonzero) digits is 141750, while the sum is 40.

The square root of 55706593 is about 7463.6849477989. The cubic root of 55706593 is about 381.9168907216.

The spelling of 55706593 in words is "fifty-five million, seven hundred six thousand, five hundred ninety-three".