56787709 has 8 divisors (see below), whose sum is σ = 62043552. Its totient is φ = 51547440.

The previous prime is 56787673. The next prime is 56787719. The reversal of 56787709 is 90778765.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 56787709 - 2⁷ = 56787581 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 (56787719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4542 + ... + 11584.

It is an arithmetic number, because the mean of its divisors is an integer number (7755444).

Almost surely, 2^56787709 is an apocalyptic number.

It is an amenable number.

56787709 is a deficient number, since it is larger than the sum of its proper divisors (5255843).

56787709 is a wasteful number, since it uses less digits than its factorization.

56787709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7787.

The product of its (nonzero) digits is 740880, while the sum is 49.

The square root of 56787709 is about 7535.7620052653. The cubic root of 56787709 is about 384.3717397128.

The spelling of 56787709 in words is "fifty-six million, seven hundred eighty-seven thousand, seven hundred nine".