56687783 has 2 divisors, whose sum is σ = 56687784. Its totient is φ = 56687782.

The previous prime is 56687759. The next prime is 56687791. The reversal of 56687783 is 38778665.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 56687783 - 2¹⁸ = 56425639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56687753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28343891 + 28343892.

It is an arithmetic number, because the mean of its divisors is an integer number (28343892).

Almost surely, 2^56687783 is an apocalyptic number.

56687783 is a deficient number, since it is larger than the sum of its proper divisors (1).

56687783 is an equidigital number, since it uses as much as digits as its factorization.

56687783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 50.

The square root of 56687783 is about 7529.1289668859. The cubic root of 56687783 is about 384.1461552115.

The spelling of 56687783 in words is "fifty-six million, six hundred eighty-seven thousand, seven hundred eighty-three".