56587709 has 2 divisors, whose sum is σ = 56587710. Its totient is φ = 56587708.

The previous prime is 56587669. The next prime is 56587711. The reversal of 56587709 is 90778565.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56580484 + 7225 = 7522^2 + 85^2 .

It is a cyclic number.

It is not a de Polignac number, because 56587709 - 2¹² = 56583613 is a prime.

Together with 56587711, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56587789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28293854 + 28293855.

It is an arithmetic number, because the mean of its divisors is an integer number (28293855).

Almost surely, 2^56587709 is an apocalyptic number.

It is an amenable number.

56587709 is a deficient number, since it is larger than the sum of its proper divisors (1).

56587709 is an equidigital number, since it uses as much as digits as its factorization.

56587709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 56587709 is about 7522.4802425796. The cubic root of 56587709 is about 383.9199707536.

The spelling of 56587709 in words is "fifty-six million, five hundred eighty-seven thousand, seven hundred nine".