687167743 has 2 divisors, whose sum is σ = 687167744. Its totient is φ = 687167742.

The previous prime is 687167729. The next prime is 687167753. The reversal of 687167743 is 347761786.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687167743 - 2⁹ = 687167231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687167753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343583871 + 343583872.

It is an arithmetic number, because the mean of its divisors is an integer number (343583872).

Almost surely, 2^687167743 is an apocalyptic number.

687167743 is a deficient number, since it is larger than the sum of its proper divisors (1).

687167743 is an equidigital number, since it uses as much as digits as its factorization.

687167743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1185408, while the sum is 49.

The square root of 687167743 is about 26213.8845461713. The cubic root of 687167743 is about 882.4448811699. Note that the first 3 decimals are identical.

The spelling of 687167743 in words is "six hundred eighty-seven million, one hundred sixty-seven thousand, seven hundred forty-three".