1233989 has 4 divisors (see below), whose sum is σ = 1245420. Its totient is φ = 1222560.

The previous prime is 1233983. The next prime is 1234001. The reversal of 1233989 is 9893321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 432964 + 801025 = 658^2 + 895^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1233989 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1233983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5552 + ... + 5769.

It is an arithmetic number, because the mean of its divisors is an integer number (311355).

2^1233989 is an apocalyptic number.

It is an amenable number.

1233989 is a deficient number, since it is larger than the sum of its proper divisors (11431).

1233989 is a wasteful number, since it uses less digits than its factorization.

1233989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11430.

The product of its digits is 11664, while the sum is 35.

The square root of 1233989 is about 1110.8505750100. The cubic root of 1233989 is about 107.2598279781.

It can be divided in two parts, 1233 and 989, that added together give a palindrome (2222).

The spelling of 1233989 in words is "one million, two hundred thirty-three thousand, nine hundred eighty-nine".