687163471 has 2 divisors, whose sum is σ = 687163472. Its totient is φ = 687163470.

The previous prime is 687163447. The next prime is 687163483. The reversal of 687163471 is 174361786.

687163471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 687163471 - 2¹⁷ = 687032399 is a prime.

It is a super-3 number, since 3×687163471³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687163271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343581735 + 343581736.

It is an arithmetic number, because the mean of its divisors is an integer number (343581736).

Almost surely, 2^687163471 is an apocalyptic number.

687163471 is a deficient number, since it is larger than the sum of its proper divisors (1).

687163471 is an equidigital number, since it uses as much as digits as its factorization.

687163471 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 169344, while the sum is 43.

The square root of 687163471 is about 26213.8030625089. The cubic root of 687163471 is about 882.4430524983.

The spelling of 687163471 in words is "six hundred eighty-seven million, one hundred sixty-three thousand, four hundred seventy-one".