687740611 has 6 divisors (see below), whose sum is σ = 710642436. Its totient is φ = 665554500.

The previous prime is 687740591. The next prime is 687740621. The reversal of 687740611 is 116047786.

It is not a de Polignac number, because 687740611 - 2⁷ = 687740483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687740621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 356865 + ... + 358786.

It is an arithmetic number, because the mean of its divisors is an integer number (118440406).

Almost surely, 2^687740611 is an apocalyptic number.

687740611 is a deficient number, since it is larger than the sum of its proper divisors (22901825).

687740611 is an equidigital number, since it uses as much as digits as its factorization.

687740611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715713 (or 715682 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 687740611 is about 26224.8090746148. The cubic root of 687740611 is about 882.6900343245.

The spelling of 687740611 in words is "six hundred eighty-seven million, seven hundred forty thousand, six hundred eleven".