55756747 has 4 divisors (see below), whose sum is σ = 56308896. Its totient is φ = 55204600.

The previous prime is 55756739. The next prime is 55756751. The reversal of 55756747 is 74765755.

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 55756747 - 2³ = 55756739 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55756697 and 55756706.

It is not an unprimeable number, because it can be changed into a prime (55756777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275923 + ... + 276124.

It is an arithmetic number, because the mean of its divisors is an integer number (14077224).

Almost surely, 2^55756747 is an apocalyptic number.

55756747 is a deficient number, since it is larger than the sum of its proper divisors (552149).

55756747 is a wasteful number, since it uses less digits than its factorization.

55756747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552148.

The product of its digits is 1029000, while the sum is 46.

The square root of 55756747 is about 7467.0440604030. The cubic root of 55756747 is about 382.0314726954.

The spelling of 55756747 in words is "fifty-five million, seven hundred fifty-six thousand, seven hundred forty-seven".