55912787 has 4 divisors (see below), whose sum is σ = 63900336. Its totient is φ = 47925240.

The previous prime is 55912781. The next prime is 55912789. The reversal of 55912787 is 78721955.

55912787 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.

It is a cyclic number.

It is not a de Polignac number, because 55912787 - 2²⁰ = 54864211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55912781) 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, 3993764 + ... + 3993777.

It is an arithmetic number, because the mean of its divisors is an integer number (15975084).

Almost surely, 2^55912787 is an apocalyptic number.

55912787 is a deficient number, since it is larger than the sum of its proper divisors (7987549).

55912787 is an equidigital number, since it uses as much as digits as its factorization.

55912787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7987548.

The product of its digits is 176400, while the sum is 44.

The square root of 55912787 is about 7477.4853393370. The cubic root of 55912787 is about 382.3875232817.

The spelling of 55912787 in words is "fifty-five million, nine hundred twelve thousand, seven hundred eighty-seven".