687162673 has 2 divisors, whose sum is σ = 687162674. Its totient is φ = 687162672.

The previous prime is 687162643. The next prime is 687162677. The reversal of 687162673 is 376261786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 607721104 + 79441569 = 24652^2 + 8913^2 .

It is a cyclic number.

It is not a de Polignac number, because 687162673 - 2²⁹ = 150291761 is a prime.

It is not a weakly prime, because it can be changed into another prime (687162677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343581336 + 343581337.

It is an arithmetic number, because the mean of its divisors is an integer number (343581337).

Almost surely, 2^687162673 is an apocalyptic number.

It is an amenable number.

687162673 is a deficient number, since it is larger than the sum of its proper divisors (1).

687162673 is an equidigital number, since it uses as much as digits as its factorization.

687162673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 687162673 is about 26213.7878415158. The cubic root of 687162673 is about 882.4427109057.

The spelling of 687162673 in words is "six hundred eighty-seven million, one hundred sixty-two thousand, six hundred seventy-three".