687785354 has 8 divisors (see below), whose sum is σ = 1092365028. Its totient is φ = 323663680.

The previous prime is 687785327. The next prime is 687785363. The reversal of 687785354 is 453587786.

It can be written as a sum of positive squares in 2 ways, for example, as 678342025 + 9443329 = 26045^2 + 3073^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 687785296 and 687785305.

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, 10114457 + ... + 10114524.

Almost surely, 2^687785354 is an apocalyptic number.

687785354 is a deficient number, since it is larger than the sum of its proper divisors (404579674).

687785354 is a wasteful number, since it uses less digits than its factorization.

687785354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20229000.

The product of its digits is 5644800, while the sum is 53.

The square root of 687785354 is about 26225.6621270083. The cubic root of 687785354 is about 882.7091759132.

The spelling of 687785354 in words is "six hundred eighty-seven million, seven hundred eighty-five thousand, three hundred fifty-four".