687340063 has 2 divisors, whose sum is σ = 687340064. Its totient is φ = 687340062.

The previous prime is 687340057. The next prime is 687340099. The reversal of 687340063 is 360043786.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687340063 - 2⁹ = 687339551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687340033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343670031 + 343670032.

It is an arithmetic number, because the mean of its divisors is an integer number (343670032).

Almost surely, 2^687340063 is an apocalyptic number.

687340063 is a deficient number, since it is larger than the sum of its proper divisors (1).

687340063 is an equidigital number, since it uses as much as digits as its factorization.

687340063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 37.

The square root of 687340063 is about 26217.1711479328. The cubic root of 687340063 is about 882.5186381210.

The spelling of 687340063 in words is "six hundred eighty-seven million, three hundred forty thousand, sixty-three".