1688072289 has 8 divisors (see below), whose sum is σ = 2251223712. Its totient is φ = 1125151200.

The previous prime is 1688072251. The next prime is 1688072291. The reversal of 1688072289 is 9822708861.

It is a happy number.

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

It is not a de Polignac number, because 1688072289 - 2⁸ = 1688072033 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1688072389) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39687 + ... + 70364.

It is an arithmetic number, because the mean of its divisors is an integer number (281402964).

Almost surely, 2^1688072289 is an apocalyptic number.

It is an amenable number.

1688072289 is a deficient number, since it is larger than the sum of its proper divisors (563151423).

1688072289 is a wasteful number, since it uses less digits than its factorization.

1688072289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115167.

The product of its (nonzero) digits is 774144, while the sum is 51.

The square root of 1688072289 is about 41086.1569022950. The cubic root of 1688072289 is about 1190.6853592701.

The spelling of 1688072289 in words is "one billion, six hundred eighty-eight million, seventy-two thousand, two hundred eighty-nine".