687431734 has 12 divisors (see below), whose sum is σ = 1133410572. Its totient is φ = 312468860.

The previous prime is 687431713. The next prime is 687431741. The reversal of 687431734 is 437134786.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1420072 + ... + 1420555.

It is an arithmetic number, because the mean of its divisors is an integer number (94450881).

Almost surely, 2^687431734 is an apocalyptic number.

687431734 is a deficient number, since it is larger than the sum of its proper divisors (445978838).

687431734 is a wasteful number, since it uses less digits than its factorization.

687431734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840651 (or 2840640 counting only the distinct ones).

The product of its digits is 338688, while the sum is 43.

The square root of 687431734 is about 26218.9193903944. The cubic root of 687431734 is about 882.5578704089.

The spelling of 687431734 in words is "six hundred eighty-seven million, four hundred thirty-one thousand, seven hundred thirty-four".