56743987 has 2 divisors, whose sum is σ = 56743988. Its totient is φ = 56743986.

The previous prime is 56743957. The next prime is 56744021. The reversal of 56743987 is 78934765.

It is a happy number.

56743987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56743987 - 2⁷ = 56743859 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56743987.

It is not a weakly prime, because it can be changed into another prime (56743957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28371993 + 28371994.

It is an arithmetic number, because the mean of its divisors is an integer number (28371994).

Almost surely, 2^56743987 is an apocalyptic number.

56743987 is a deficient number, since it is larger than the sum of its proper divisors (1).

56743987 is an equidigital number, since it uses as much as digits as its factorization.

56743987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 49.

The square root of 56743987 is about 7532.8604792602. The cubic root of 56743987 is about 384.2730692064.

The spelling of 56743987 in words is "fifty-six million, seven hundred forty-three thousand, nine hundred eighty-seven".