1687538734 has 32 divisors (see below), whose sum is σ = 2957515200. Its totient is φ = 721871136.

The previous prime is 1687538731. The next prime is 1687538747. The reversal of 1687538734 is 4378357861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1687538731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 418512 + ... + 422524.

It is an arithmetic number, because the mean of its divisors is an integer number (92422350).

Almost surely, 2^1687538734 is an apocalyptic number.

1687538734 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1687538734 is a deficient number, since it is larger than the sum of its proper divisors (1269976466).

1687538734 is an equidigital number, since it uses as much as digits as its factorization.

1687538734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649 (or 4635 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 52.

The square root of 1687538734 is about 41079.6632654164. The cubic root of 1687538734 is about 1190.5598980016.

The spelling of 1687538734 in words is "one billion, six hundred eighty-seven million, five hundred thirty-eight thousand, seven hundred thirty-four".