1129998665 has 8 divisors (see below), whose sum is σ = 1356912000. Its totient is φ = 903389872.

The previous prime is 1129998643. The next prime is 1129998673. The reversal of 1129998665 is 5668999211.

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 1129998665 - 2⁸ = 1129998409 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1129998665.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 67889 + ... + 82878.

It is an arithmetic number, because the mean of its divisors is an integer number (169614000).

Almost surely, 2^1129998665 is an apocalyptic number.

It is an amenable number.

1129998665 is a deficient number, since it is larger than the sum of its proper divisors (226913335).

1129998665 is a wasteful number, since it uses less digits than its factorization.

1129998665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152271.

The product of its digits is 2099520, while the sum is 56.

The square root of 1129998665 is about 33615.4527710099. The cubic root of 1129998665 is about 1041.5800271265.

The spelling of 1129998665 in words is "one billion, one hundred twenty-nine million, nine hundred ninety-eight thousand, six hundred sixty-five".