56787719 has 2 divisors, whose sum is σ = 56787720. Its totient is φ = 56787718.

The previous prime is 56787673. The next prime is 56787721. The reversal of 56787719 is 91778765.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56787719 is a prime.

It is a super-2 number, since 2×56787719² = 6449690058445922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 56787721, 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 (56787739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28393859 + 28393860.

It is an arithmetic number, because the mean of its divisors is an integer number (28393860).

Almost surely, 2^56787719 is an apocalyptic number.

56787719 is a deficient number, since it is larger than the sum of its proper divisors (1).

56787719 is an equidigital number, since it uses as much as digits as its factorization.

56787719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 50.

The square root of 56787719 is about 7535.7626687682. The cubic root of 56787719 is about 384.3717622747.

The spelling of 56787719 in words is "fifty-six million, seven hundred eighty-seven thousand, seven hundred nineteen".