687734037 has 8 divisors (see below), whose sum is σ = 1018865280. Its totient is φ = 458489340.

The previous prime is 687734023. The next prime is 687734057. The reversal of 687734037 is 730437786.

It is not a de Polignac number, because 687734037 - 2¹⁸ = 687471893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 687733983 and 687734001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (687734057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12735789 + ... + 12735842.

It is an arithmetic number, because the mean of its divisors is an integer number (127358160).

Almost surely, 2^687734037 is an apocalyptic number.

It is an amenable number.

687734037 is a deficient number, since it is larger than the sum of its proper divisors (331131243).

687734037 is a wasteful number, since it uses less digits than its factorization.

687734037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25471640 (or 25471634 counting only the distinct ones).

The product of its (nonzero) digits is 592704, while the sum is 45.

The square root of 687734037 is about 26224.6837349853. The cubic root of 687734037 is about 882.6872218190.

The spelling of 687734037 in words is "six hundred eighty-seven million, seven hundred thirty-four thousand, thirty-seven".