687416005 has 4 divisors (see below), whose sum is σ = 824899212. Its totient is φ = 549932800.

The previous prime is 687415901. The next prime is 687416053. The reversal of 687416005 is 500614786.

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

It can be written as a sum of positive squares in 2 ways, for example, as 149964516 + 537451489 = 12246^2 + 23183^2 .

It is not a de Polignac number, because 687416005 - 2¹⁷ = 687284933 is a prime.

It is a Duffinian number.

It is a congruent 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, 68741596 + ... + 68741605.

It is an arithmetic number, because the mean of its divisors is an integer number (206224803).

Almost surely, 2^687416005 is an apocalyptic number.

It is an amenable number.

687416005 is a deficient number, since it is larger than the sum of its proper divisors (137483207).

687416005 is a wasteful number, since it uses less digits than its factorization.

687416005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137483206.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 687416005 is about 26218.6194335247. The cubic root of 687416005 is about 882.5511391424.

The spelling of 687416005 in words is "six hundred eighty-seven million, four hundred sixteen thousand, five".