687659047 has 8 divisors (see below), whose sum is σ = 701084160. Its totient is φ = 674250720.

The previous prime is 687659017. The next prime is 687659057. The reversal of 687659047 is 740956786.

It is a happy number.

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 687659047 - 2⁷ = 687658919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 687658985 and 687659003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687659017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106522 + ... + 112792.

It is an arithmetic number, because the mean of its divisors is an integer number (87635520).

Almost surely, 2^687659047 is an apocalyptic number.

687659047 is a deficient number, since it is larger than the sum of its proper divisors (13425113).

687659047 is a wasteful number, since it uses less digits than its factorization.

687659047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8393.

The product of its (nonzero) digits is 2540160, while the sum is 52.

The square root of 687659047 is about 26223.2539361537. The cubic root of 687659047 is about 882.6551381368.

The spelling of 687659047 in words is "six hundred eighty-seven million, six hundred fifty-nine thousand, forty-seven".