1289393369 has 8 divisors (see below), whose sum is σ = 1412810208. Its totient is φ = 1167009760.

The previous prime is 1289393321. The next prime is 1289393377. The reversal of 1289393369 is 9633939821.

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 1289393369 - 2⁸ = 1289393113 is a prime.

It is a super-2 number, since 2×1289393369² = 3325070520042340322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1289393369.

It is not an unprimeable number, because it can be changed into a prime (1289393069) 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, 255692 + ... + 260685.

It is an arithmetic number, because the mean of its divisors is an integer number (176601276).

Almost surely, 2^1289393369 is an apocalyptic number.

It is an amenable number.

1289393369 is a deficient number, since it is larger than the sum of its proper divisors (123416839).

1289393369 is a wasteful number, since it uses less digits than its factorization.

1289393369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516615.

The product of its digits is 1889568, while the sum is 53.

The square root of 1289393369 is about 35908.1239972238. The cubic root of 1289393369 is about 1088.4165682582.

The spelling of 1289393369 in words is "one billion, two hundred eighty-nine million, three hundred ninety-three thousand, three hundred sixty-nine".