687601097 has 2 divisors, whose sum is σ = 687601098. Its totient is φ = 687601096.
The previous prime is 687601073. The next prime is 687601141. The reversal of 687601097 is 790106786.
It is an a-pointer prime, because the next prime (687601141) can be obtained adding 687601097 to its sum of digits (44).
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 460917961 + 226683136 = 21469^2 + 15056^2 .
It is a cyclic number.
It is not a de Polignac number, because 687601097 - 28 = 687600841 is a prime.
It is not a weakly prime, because it can be changed into another prime (687601067) 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, 343800548 + 343800549.
It is an arithmetic number, because the mean of its divisors is an integer number (343800549).
Almost surely, 2687601097 is an apocalyptic number.
It is an amenable number.
687601097 is a deficient number, since it is larger than the sum of its proper divisors (1).
687601097 is an equidigital number, since it uses as much as digits as its factorization.
687601097 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 127008, while the sum is 44.
The square root of 687601097 is about 26222.1489775342. The cubic root of 687601097 is about 882.6303432415.
The spelling of 687601097 in words is "six hundred eighty-seven million, six hundred one thousand, ninety-seven".
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