687591347 has 2 divisors, whose sum is σ = 687591348. Its totient is φ = 687591346.

The previous prime is 687591301. The next prime is 687591413. The reversal of 687591347 is 743195786.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687591347 - 2¹⁴ = 687574963 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 687591295 and 687591304.

It is not a weakly prime, because it can be changed into another prime (687599347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343795673 + 343795674.

It is an arithmetic number, because the mean of its divisors is an integer number (343795674).

Almost surely, 2^687591347 is an apocalyptic number.

687591347 is a deficient number, since it is larger than the sum of its proper divisors (1).

687591347 is an equidigital number, since it uses as much as digits as its factorization.

687591347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 687591347 is about 26221.9630653389. The cubic root of 687591347 is about 882.6261714009.

The spelling of 687591347 in words is "six hundred eighty-seven million, five hundred ninety-one thousand, three hundred forty-seven".