687268697 has 2 divisors, whose sum is σ = 687268698. Its totient is φ = 687268696.

The previous prime is 687268693. The next prime is 687268717. The reversal of 687268697 is 796862786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 666620761 + 20647936 = 25819^2 + 4544^2 .

It is a cyclic number.

It is not a de Polignac number, because 687268697 - 2² = 687268693 is a prime.

It is not a weakly prime, because it can be changed into another prime (687268693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343634348 + 343634349.

It is an arithmetic number, because the mean of its divisors is an integer number (343634349).

Almost surely, 2^687268697 is an apocalyptic number.

It is an amenable number.

687268697 is a deficient number, since it is larger than the sum of its proper divisors (1).

687268697 is an equidigital number, since it uses as much as digits as its factorization.

687268697 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12192768, while the sum is 59.

The square root of 687268697 is about 26215.8100580547. The cubic root of 687268697 is about 882.4880933157.

The spelling of 687268697 in words is "six hundred eighty-seven million, two hundred sixty-eight thousand, six hundred ninety-seven".