687071473 has 16 divisors (see below), whose sum is σ = 804816000. Its totient is φ = 579577600.

The previous prime is 687071471. The next prime is 687071477. The reversal of 687071473 is 374170786.

It is not a de Polignac number, because 687071473 - 2¹ = 687071471 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687071471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12598 + ... + 39151.

It is an arithmetic number, because the mean of its divisors is an integer number (50301000).

Almost surely, 2^687071473 is an apocalyptic number.

It is an amenable number.

687071473 is a deficient number, since it is larger than the sum of its proper divisors (117744527).

687071473 is a wasteful number, since it uses less digits than its factorization.

687071473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51848.

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 687071473 is about 26212.0482412192. The cubic root of 687071473 is about 882.4036700114.

The spelling of 687071473 in words is "six hundred eighty-seven million, seventy-one thousand, four hundred seventy-three".