687033601 has 2 divisors, whose sum is σ = 687033602. Its totient is φ = 687033600.

The previous prime is 687033593. The next prime is 687033617. The reversal of 687033601 is 106330786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 538193601 + 148840000 = 23199^2 + 12200^2 .

It is a cyclic number.

It is not a de Polignac number, because 687033601 - 2³ = 687033593 is a prime.

It is not a weakly prime, because it can be changed into another prime (687033001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343516800 + 343516801.

It is an arithmetic number, because the mean of its divisors is an integer number (343516801).

Almost surely, 2^687033601 is an apocalyptic number.

It is an amenable number.

687033601 is a deficient number, since it is larger than the sum of its proper divisors (1).

687033601 is an equidigital number, since it uses as much as digits as its factorization.

687033601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 687033601 is about 26211.3258153799. The cubic root of 687033601 is about 882.3874567512.

The spelling of 687033601 in words is "six hundred eighty-seven million, thirty-three thousand, six hundred one".