655349987 has 8 divisors (see below), whose sum is σ = 663616800. Its totient is φ = 647103424.

The previous prime is 655349969. The next prime is 655350001. The reversal of 655349987 is 789943556.

It is a happy number.

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 655349987 - 2⁶ = 655349923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (655349287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66314 + ... + 75552.

It is an arithmetic number, because the mean of its divisors is an integer number (82952100).

Almost surely, 2^655349987 is an apocalyptic number.

655349987 is a deficient number, since it is larger than the sum of its proper divisors (8266813).

655349987 is an equidigital number, since it uses as much as digits as its factorization.

655349987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10125.

The product of its digits is 8164800, while the sum is 56.

The square root of 655349987 is about 25599.8044328467. The cubic root of 655349987 is about 868.6092135470.

The spelling of 655349987 in words is "six hundred fifty-five million, three hundred forty-nine thousand, nine hundred eighty-seven".