556982987 has 4 divisors (see below), whose sum is σ = 607617816. Its totient is φ = 506348160.

The previous prime is 556982939. The next prime is 556983017. The reversal of 556982987 is 789289655.

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 556982987 - 2²⁶ = 489874123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556982087) 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, 25317398 + ... + 25317419.

It is an arithmetic number, because the mean of its divisors is an integer number (151904454).

Almost surely, 2^556982987 is an apocalyptic number.

556982987 is a deficient number, since it is larger than the sum of its proper divisors (50634829).

556982987 is a wasteful number, since it uses less digits than its factorization.

556982987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50634828.

The product of its digits is 10886400, while the sum is 59.

The square root of 556982987 is about 23600.4870076869. The cubic root of 556982987 is about 822.7741590287.

It can be divided in two parts, 55698 and 2987, that added together give a palindrome (58685).

The spelling of 556982987 in words is "five hundred fifty-six million, nine hundred eighty-two thousand, nine hundred eighty-seven".