687349734 has 16 divisors (see below), whose sum is σ = 1375211520. Its totient is φ = 229031240.

The previous prime is 687349709. The next prime is 687349771. The reversal of 687349734 is 437943786.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2622 + ... + 37169.

It is an arithmetic number, because the mean of its divisors is an integer number (85950720).

Almost surely, 2^687349734 is an apocalyptic number.

687349734 is an abundant number, since it is smaller than the sum of its proper divisors (687861786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

687349734 is a wasteful number, since it uses less digits than its factorization.

687349734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42675.

The product of its digits is 3048192, while the sum is 51.

The square root of 687349734 is about 26217.3555874730. The cubic root of 687349734 is about 882.5227771676.

The spelling of 687349734 in words is "six hundred eighty-seven million, three hundred forty-nine thousand, seven hundred thirty-four".