56547973 has 4 divisors (see below), whose sum is σ = 56564748. Its totient is φ = 56531200.

The previous prime is 56547949. The next prime is 56547977. The reversal of 56547973 is 37974565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37974565 = 5 ⋅7594913.

It can be written as a sum of positive squares in 2 ways, for example, as 55845729 + 702244 = 7473^2 + 838^2 .

It is a cyclic number.

It is not a de Polignac number, because 56547973 - 2¹³ = 56539781 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 (56547977) 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, 1378 + ... + 10723.

It is an arithmetic number, because the mean of its divisors is an integer number (14141187).

Almost surely, 2^56547973 is an apocalyptic number.

It is an amenable number.

56547973 is a deficient number, since it is larger than the sum of its proper divisors (16775).

56547973 is a wasteful number, since it uses less digits than its factorization.

56547973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16774.

The product of its digits is 793800, while the sum is 46.

The square root of 56547973 is about 7519.8386285877. The cubic root of 56547973 is about 383.8300865931.

The spelling of 56547973 in words is "fifty-six million, five hundred forty-seven thousand, nine hundred seventy-three".