56393687 has 4 divisors (see below), whose sum is σ = 64449936. Its totient is φ = 48337440.

The previous prime is 56393671. The next prime is 56393717. The reversal of 56393687 is 78639365.

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

It is a cyclic number.

It is not a de Polignac number, because 56393687 - 2⁴ = 56393671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56393287) 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 in 3 ways as a sum of consecutive naturals, for example, 4028114 + ... + 4028127.

It is an arithmetic number, because the mean of its divisors is an integer number (16112484).

Almost surely, 2^56393687 is an apocalyptic number.

56393687 is a deficient number, since it is larger than the sum of its proper divisors (8056249).

56393687 is an equidigital number, since it uses as much as digits as its factorization.

56393687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8056248.

The product of its digits is 816480, while the sum is 47.

The square root of 56393687 is about 7509.5730238143. The cubic root of 56393687 is about 383.4806868073.

The spelling of 56393687 in words is "fifty-six million, three hundred ninety-three thousand, six hundred eighty-seven".