55947789 has 6 divisors (see below), whose sum is σ = 80813486. Its totient is φ = 37298520.

The previous prime is 55947779. The next prime is 55947791. The reversal of 55947789 is 98774955.

55947789 is a `hidden beast` number, since 559 + 4 + 7 + 7 + 89 = 666.

55947789 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 only one way, i.e., 52272900 + 3674889 = 7230^2 + 1917^2 .

It is not a de Polignac number, because 55947789 - 2¹¹ = 55945741 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 (55947779) 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 5 ways as a sum of consecutive naturals, for example, 3108202 + ... + 3108219.

Almost surely, 2^55947789 is an apocalyptic number.

It is an amenable number.

55947789 is a deficient number, since it is larger than the sum of its proper divisors (24865697).

55947789 is a wasteful number, since it uses less digits than its factorization.

55947789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216427 (or 6216424 counting only the distinct ones).

The product of its digits is 3175200, while the sum is 54.

The square root of 55947789 is about 7479.8254658782. The cubic root of 55947789 is about 382.4672995241.

The spelling of 55947789 in words is "fifty-five million, nine hundred forty-seven thousand, seven hundred eighty-nine".