687606311 has 8 divisors (see below), whose sum is σ = 789909024. Its totient is φ = 586321920.

The previous prime is 687606281. The next prime is 687606317. The reversal of 687606311 is 113606786.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 687606311 - 2¹⁰ = 687605287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687606317) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 253130 + ... + 255831.

It is an arithmetic number, because the mean of its divisors is an integer number (98738628).

Almost surely, 2^687606311 is an apocalyptic number.

687606311 is a deficient number, since it is larger than the sum of its proper divisors (102302713).

687606311 is a wasteful number, since it uses less digits than its factorization.

687606311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509161.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 687606311 is about 26222.2483971150. The cubic root of 687606311 is about 882.6325741973.

The spelling of 687606311 in words is "six hundred eighty-seven million, six hundred six thousand, three hundred eleven".