687133238 has 8 divisors (see below), whose sum is σ = 1124399880. Its totient is φ = 312333280.

The previous prime is 687133189. The next prime is 687133241. The reversal of 687133238 is 832331786.

687133238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-3 number, since 3×687133238³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 687133195 and 687133204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15616643 + ... + 15616686.

It is an arithmetic number, because the mean of its divisors is an integer number (140549985).

Almost surely, 2^687133238 is an apocalyptic number.

687133238 is a deficient number, since it is larger than the sum of its proper divisors (437266642).

687133238 is a wasteful number, since it uses less digits than its factorization.

687133238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31233342.

The product of its digits is 145152, while the sum is 41.

The square root of 687133238 is about 26213.2263943224. The cubic root of 687133238 is about 882.4301107490.

The spelling of 687133238 in words is "six hundred eighty-seven million, one hundred thirty-three thousand, two hundred thirty-eight".