687701287 has 8 divisors (see below), whose sum is σ = 846401696. Its totient is φ = 544115232.

The previous prime is 687701207. The next prime is 687701293. The reversal of 687701287 is 782107786.

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 687701287 - 2²³ = 679312679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687701207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3778488 + ... + 3778669.

It is an arithmetic number, because the mean of its divisors is an integer number (105800212).

Almost surely, 2^687701287 is an apocalyptic number.

687701287 is a deficient number, since it is larger than the sum of its proper divisors (158700409).

687701287 is a wasteful number, since it uses less digits than its factorization.

687701287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7557177.

The product of its (nonzero) digits is 263424, while the sum is 46.

The square root of 687701287 is about 26224.0593158268. The cubic root of 687701287 is about 882.6732103631.

The spelling of 687701287 in words is "six hundred eighty-seven million, seven hundred one thousand, two hundred eighty-seven".