655654987 has 8 divisors (see below), whose sum is σ = 706318704. Its totient is φ = 605023968.

The previous prime is 655654957. The next prime is 655654999. The reversal of 655654987 is 789456556.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655654987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655654957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47628 + ... + 59830.

It is an arithmetic number, because the mean of its divisors is an integer number (88289838).

Almost surely, 2^655654987 is an apocalyptic number.

655654987 is a deficient number, since it is larger than the sum of its proper divisors (50663717).

655654987 is a wasteful number, since it uses less digits than its factorization.

655654987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16349.

The product of its digits is 9072000, while the sum is 55.

The square root of 655654987 is about 25605.7608166600. The cubic root of 655654987 is about 868.7439429421.

The spelling of 655654987 in words is "six hundred fifty-five million, six hundred fifty-four thousand, nine hundred eighty-seven".