687386307 has 6 divisors (see below), whose sum is σ = 916575628. Its totient is φ = 458227264.

The previous prime is 687386269. The next prime is 687386311. The reversal of 687386307 is 703683786.

It is not a de Polignac number, because 687386307 - 2⁶ = 687386243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687386317) 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, 37843 + ... + 52979.

Almost surely, 2^687386307 is an apocalyptic number.

687386307 is a deficient number, since it is larger than the sum of its proper divisors (229189321).

687386307 is an frugal number, since it uses more digits than its factorization.

687386307 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30277 (or 15140 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 48.

The square root of 687386307 is about 26218.0530741701. The cubic root of 687386307 is about 882.5384295260.

Multiplying 687386307 by its sum of digits (48), we get a square (32994542736 = 181644²).

The spelling of 687386307 in words is "six hundred eighty-seven million, three hundred eighty-six thousand, three hundred seven".