1289189223 has 16 divisors (see below), whose sum is σ = 2182754560. Its totient is φ = 736679448.

The previous prime is 1289189201. The next prime is 1289189243. The reversal of 1289189223 is 3229819821.

It is a happy number.

It is not a de Polignac number, because 1289189223 - 2⁵ = 1289189191 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289189243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3410365 + ... + 3410742.

It is an arithmetic number, because the mean of its divisors is an integer number (136422160).

Almost surely, 2^1289189223 is an apocalyptic number.

1289189223 is a deficient number, since it is larger than the sum of its proper divisors (893565337).

1289189223 is an equidigital number, since it uses as much as digits as its factorization.

1289189223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821123 (or 6821117 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 1289189223 is about 35905.2812689164. The cubic root of 1289189223 is about 1088.3591232556.

The spelling of 1289189223 in words is "one billion, two hundred eighty-nine million, one hundred eighty-nine thousand, two hundred twenty-three".