687233507 has 4 divisors (see below), whose sum is σ = 689769696. Its totient is φ = 684697320.

The previous prime is 687233497. The next prime is 687233509. The reversal of 687233507 is 705332786.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 687233507 - 2¹⁴ = 687217123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (687233509) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1267688 + ... + 1268229.

It is an arithmetic number, because the mean of its divisors is an integer number (172442424).

Almost surely, 2^687233507 is an apocalyptic number.

687233507 is a deficient number, since it is larger than the sum of its proper divisors (2536189).

687233507 is a wasteful number, since it uses less digits than its factorization.

687233507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2536188.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 687233507 is about 26215.1388895806. The cubic root of 687233507 is about 882.4730311398.

The spelling of 687233507 in words is "six hundred eighty-seven million, two hundred thirty-three thousand, five hundred seven".