687525017 has 2 divisors, whose sum is σ = 687525018. Its totient is φ = 687525016.

The previous prime is 687525001. The next prime is 687525029. The reversal of 687525017 is 710525786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 587044441 + 100480576 = 24229^2 + 10024^2 .

It is a cyclic number.

It is not a de Polignac number, because 687525017 - 2⁴ = 687525001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (687525077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343762508 + 343762509.

It is an arithmetic number, because the mean of its divisors is an integer number (343762509).

Almost surely, 2^687525017 is an apocalyptic number.

It is an amenable number.

687525017 is a deficient number, since it is larger than the sum of its proper divisors (1).

687525017 is an equidigital number, since it uses as much as digits as its factorization.

687525017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117600, while the sum is 41.

The square root of 687525017 is about 26220.6982553860. The cubic root of 687525017 is about 882.5977890016.

The spelling of 687525017 in words is "six hundred eighty-seven million, five hundred twenty-five thousand, seventeen".