56117987 has 8 divisors (see below), whose sum is σ = 59006640. Its totient is φ = 53292960.

The previous prime is 56117959. The next prime is 56117993. The reversal of 56117987 is 78971165.

56117987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 56117987 - 2¹⁴ = 56101603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56117287) 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 in 7 ways as a sum of consecutive naturals, for example, 14093 + ... + 17630.

It is an arithmetic number, because the mean of its divisors is an integer number (7375830).

Almost surely, 2^56117987 is an apocalyptic number.

56117987 is a deficient number, since it is larger than the sum of its proper divisors (2888653).

56117987 is a wasteful number, since it uses less digits than its factorization.

56117987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31813.

The product of its digits is 105840, while the sum is 44.

The square root of 56117987 is about 7491.1939635815. The cubic root of 56117987 is about 382.8547397522.

The spelling of 56117987 in words is "fifty-six million, one hundred seventeen thousand, nine hundred eighty-seven".