55986717 has 4 divisors (see below), whose sum is σ = 74648960. Its totient is φ = 37324476.

The previous prime is 55986691. The next prime is 55986719. The reversal of 55986717 is 71768955.

55986717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55986717 - 2²⁰ = 54938141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55986719) 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 3 ways as a sum of consecutive naturals, for example, 9331117 + ... + 9331122.

It is an arithmetic number, because the mean of its divisors is an integer number (18662240).

Almost surely, 2^55986717 is an apocalyptic number.

It is an amenable number.

55986717 is a deficient number, since it is larger than the sum of its proper divisors (18662243).

55986717 is a wasteful number, since it uses less digits than its factorization.

55986717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18662242.

The product of its digits is 529200, while the sum is 48.

The square root of 55986717 is about 7482.4272131441. The cubic root of 55986717 is about 382.5559847995. Note that the first 3 decimals are identical.

The spelling of 55986717 in words is "fifty-five million, nine hundred eighty-six thousand, seven hundred seventeen".