687279955 has 8 divisors (see below), whose sum is σ = 828370512. Its totient is φ = 547400928.

The previous prime is 687279953. The next prime is 687279977. The reversal of 687279955 is 559972786.

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 687279955 - 2¹ = 687279953 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 687279955.

It is not an unprimeable number, because it can be changed into a prime (687279953) 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, 301632 + ... + 303901.

It is an arithmetic number, because the mean of its divisors is an integer number (103546314).

Almost surely, 2^687279955 is an apocalyptic number.

687279955 is a deficient number, since it is larger than the sum of its proper divisors (141090557).

687279955 is a wasteful number, since it uses less digits than its factorization.

687279955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605765.

The product of its digits is 9525600, while the sum is 58.

The square root of 687279955 is about 26216.0247749349. The cubic root of 687279955 is about 882.4929119050.

The spelling of 687279955 in words is "six hundred eighty-seven million, two hundred seventy-nine thousand, nine hundred fifty-five".