687454745 has 8 divisors (see below), whose sum is σ = 828581184. Its totient is φ = 547540144.

The previous prime is 687454739. The next prime is 687454769. The reversal of 687454745 is 547454786.

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 687454745 - 2¹⁰ = 687453721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 687454693 and 687454702.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 301709 + ... + 303978.

It is an arithmetic number, because the mean of its divisors is an integer number (103572648).

Almost surely, 2^687454745 is an apocalyptic number.

It is an amenable number.

687454745 is a deficient number, since it is larger than the sum of its proper divisors (141126439).

687454745 is a wasteful number, since it uses less digits than its factorization.

687454745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605919.

The product of its digits is 3763200, while the sum is 50.

The square root of 687454745 is about 26219.3582110623. The cubic root of 687454745 is about 882.5677178413.

The spelling of 687454745 in words is "six hundred eighty-seven million, four hundred fifty-four thousand, seven hundred forty-five".