687323597 has 2 divisors, whose sum is σ = 687323598. Its totient is φ = 687323596.

The previous prime is 687323561. The next prime is 687323633. The reversal of 687323597 is 795323786.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (687323561) and next prime (687323633).

It can be written as a sum of positive squares in only one way, i.e., 608806276 + 78517321 = 24674^2 + 8861^2 .

It is a cyclic number.

It is not a de Polignac number, because 687323597 - 2⁸ = 687323341 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 (687323297) 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, 343661798 + 343661799.

It is an arithmetic number, because the mean of its divisors is an integer number (343661799).

Almost surely, 2^687323597 is an apocalyptic number.

It is an amenable number.

687323597 is a deficient number, since it is larger than the sum of its proper divisors (1).

687323597 is an equidigital number, since it uses as much as digits as its factorization.

687323597 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 50.

The square root of 687323597 is about 26216.8571152226. The cubic root of 687323597 is about 882.5115908243.

The spelling of 687323597 in words is "six hundred eighty-seven million, three hundred twenty-three thousand, five hundred ninety-seven".