55996387 has 4 divisors (see below), whose sum is σ = 56367376. Its totient is φ = 55625400.

The previous prime is 55996379. The next prime is 55996393. The reversal of 55996387 is 78369955.

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

It is a cyclic number.

It is not a de Polignac number, because 55996387 - 2³ = 55996379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55996307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185268 + ... + 185569.

It is an arithmetic number, because the mean of its divisors is an integer number (14091844).

Almost surely, 2^55996387 is an apocalyptic number.

55996387 is a deficient number, since it is larger than the sum of its proper divisors (370989).

55996387 is a wasteful number, since it uses less digits than its factorization.

55996387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370988.

The product of its digits is 2041200, while the sum is 52.

The square root of 55996387 is about 7483.0733659373. The cubic root of 55996387 is about 382.5780084961.

The spelling of 55996387 in words is "fifty-five million, nine hundred ninety-six thousand, three hundred eighty-seven".