56752609 has 4 divisors (see below), whose sum is σ = 57530116. Its totient is φ = 55975104.

The previous prime is 56752583. The next prime is 56752627. The reversal of 56752609 is 90625765.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37638225 + 19114384 = 6135^2 + 4372^2 .

It is a cyclic number.

It is not a de Polignac number, because 56752609 - 2⁷ = 56752481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56752669) 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, 388644 + ... + 388789.

It is an arithmetic number, because the mean of its divisors is an integer number (14382529).

Almost surely, 2^56752609 is an apocalyptic number.

It is an amenable number.

56752609 is a deficient number, since it is larger than the sum of its proper divisors (777507).

56752609 is an equidigital number, since it uses as much as digits as its factorization.

56752609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777506.

The product of its (nonzero) digits is 113400, while the sum is 40.

The square root of 56752609 is about 7533.4327500815. The cubic root of 56752609 is about 384.2925310900.

The spelling of 56752609 in words is "fifty-six million, seven hundred fifty-two thousand, six hundred nine".