1688736913 has 8 divisors (see below), whose sum is σ = 1699850880. Its totient is φ = 1677655920.

The previous prime is 1688736911. The next prime is 1688736941. The reversal of 1688736913 is 3196378861.

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

It is a cyclic number.

It is not a de Polignac number, because 1688736913 - 2¹ = 1688736911 is a prime.

It is a super-2 number, since 2×1688736913² = 5703664722657539138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1688736911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99048 + ... + 114838.

It is an arithmetic number, because the mean of its divisors is an integer number (212481360).

Almost surely, 2^1688736913 is an apocalyptic number.

It is an amenable number.

1688736913 is a deficient number, since it is larger than the sum of its proper divisors (11113967).

1688736913 is a wasteful number, since it uses less digits than its factorization.

1688736913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16487.

The product of its digits is 1306368, while the sum is 52.

The square root of 1688736913 is about 41094.2442806776. The cubic root of 1688736913 is about 1190.8416034146.

The spelling of 1688736913 in words is "one billion, six hundred eighty-eight million, seven hundred thirty-six thousand, nine hundred thirteen".