687115355 has 4 divisors (see below), whose sum is σ = 824538432. Its totient is φ = 549692280.

The previous prime is 687115327. The next prime is 687115391. The reversal of 687115355 is 553511786.

687115355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 687115355 - 2⁶ = 687115291 is a prime.

It is a super-2 number, since 2×687115355² = 944255022153552050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68711531 + ... + 68711540.

It is an arithmetic number, because the mean of its divisors is an integer number (206134608).

Almost surely, 2^687115355 is an apocalyptic number.

687115355 is a deficient number, since it is larger than the sum of its proper divisors (137423077).

687115355 is a wasteful number, since it uses less digits than its factorization.

687115355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137423076.

The product of its digits is 126000, while the sum is 41.

The square root of 687115355 is about 26212.8852856758. The cubic root of 687115355 is about 882.4224554484.

The spelling of 687115355 in words is "six hundred eighty-seven million, one hundred fifteen thousand, three hundred fifty-five".