687967583 has 2 divisors, whose sum is σ = 687967584. Its totient is φ = 687967582.

The previous prime is 687967571. The next prime is 687967619. The reversal of 687967583 is 385769786.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687967583 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687967183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343983791 + 343983792.

It is an arithmetic number, because the mean of its divisors is an integer number (343983792).

Almost surely, 2^687967583 is an apocalyptic number.

687967583 is a deficient number, since it is larger than the sum of its proper divisors (1).

687967583 is an equidigital number, since it uses as much as digits as its factorization.

687967583 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 59.

The square root of 687967583 is about 26229.1361466595. The cubic root of 687967583 is about 882.7871270770.

The spelling of 687967583 in words is "six hundred eighty-seven million, nine hundred sixty-seven thousand, five hundred eighty-three".