56087999 has 4 divisors (see below), whose sum is σ = 61186920. Its totient is φ = 50989080.

The previous prime is 56087971. The next prime is 56088023. The reversal of 56087999 is 99978065.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56087999 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 56087999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56087909) 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, 2549444 + ... + 2549465.

It is an arithmetic number, because the mean of its divisors is an integer number (15296730).

Almost surely, 2^56087999 is an apocalyptic number.

56087999 is a deficient number, since it is larger than the sum of its proper divisors (5098921).

56087999 is a wasteful number, since it uses less digits than its factorization.

56087999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098920.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 56087999 is about 7489.1921460195. The cubic root of 56087999 is about 382.7865317129.

The spelling of 56087999 in words is "fifty-six million, eighty-seven thousand, nine hundred ninety-nine".