687342938 has 8 divisors (see below), whose sum is σ = 1031227200. Its totient is φ = 343600540.

The previous prime is 687342919. The next prime is 687342941. The reversal of 687342938 is 839243786.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22388 + ... + 43311.

It is an arithmetic number, because the mean of its divisors is an integer number (128903400).

Almost surely, 2^687342938 is an apocalyptic number.

687342938 is a deficient number, since it is larger than the sum of its proper divisors (343884262).

687342938 is a wasteful number, since it uses less digits than its factorization.

687342938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70932.

The product of its digits is 1741824, while the sum is 50.

The square root of 687342938 is about 26217.2259783525. The cubic root of 687342938 is about 882.5198685830.

The spelling of 687342938 in words is "six hundred eighty-seven million, three hundred forty-two thousand, nine hundred thirty-eight".