56727787 has 4 divisors (see below), whose sum is σ = 59713480. Its totient is φ = 53742096.

The previous prime is 56727779. The next prime is 56727791. The reversal of 56727787 is 78772765.

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 56727787 - 2³ = 56727779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56727787.

It is not an unprimeable number, because it can be changed into a prime (56721787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1492818 + ... + 1492855.

It is an arithmetic number, because the mean of its divisors is an integer number (14928370).

Almost surely, 2^56727787 is an apocalyptic number.

56727787 is a deficient number, since it is larger than the sum of its proper divisors (2985693).

56727787 is a wasteful number, since it uses less digits than its factorization.

56727787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2985692.

The product of its digits is 1152480, while the sum is 49.

The square root of 56727787 is about 7531.7851137695. The cubic root of 56727787 is about 384.2364966603.

The spelling of 56727787 in words is "fifty-six million, seven hundred twenty-seven thousand, seven hundred eighty-seven".