687849620707 has 2 divisors, whose sum is σ = 687849620708. Its totient is φ = 687849620706.

The previous prime is 687849620677. The next prime is 687849620741. The reversal of 687849620707 is 707026948786.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-687849620707 is a prime.

It is a super-3 number, since 3×687849620707³ (a number of 36 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (687849621707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343924810353 + 343924810354.

It is an arithmetic number, because the mean of its divisors is an integer number (343924810354).

Almost surely, 2^687849620707 is an apocalyptic number.

687849620707 is a deficient number, since it is larger than the sum of its proper divisors (1).

687849620707 is an equidigital number, since it uses as much as digits as its factorization.

687849620707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56899584, while the sum is 64.

The spelling of 687849620707 in words is "six hundred eighty-seven billion, eight hundred forty-nine million, six hundred twenty thousand, seven hundred seven".