1088691689 has 8 divisors (see below), whose sum is σ = 1096381440. Its totient is φ = 1081029456.

The previous prime is 1088691649. The next prime is 1088691719. The reversal of 1088691689 is 9861968801.

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 1088691689 - 2¹⁶ = 1088626153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1088691619) 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, 75992 + ... + 89174.

It is an arithmetic number, because the mean of its divisors is an integer number (137047680).

Almost surely, 2^1088691689 is an apocalyptic number.

It is an amenable number.

1088691689 is a deficient number, since it is larger than the sum of its proper divisors (7689751).

1088691689 is a wasteful number, since it uses less digits than its factorization.

1088691689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13759.

The product of its (nonzero) digits is 1492992, while the sum is 56.

The square root of 1088691689 is about 32995.3282905323. The cubic root of 1088691689 is about 1028.7305468551.

The spelling of 1088691689 in words is "one billion, eighty-eight million, six hundred ninety-one thousand, six hundred eighty-nine".