289173121 has 4 divisors (see below), whose sum is σ = 289207744. Its totient is φ = 289138500.

The previous prime is 289173113. The next prime is 289173149. The reversal of 289173121 is 121371982.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 289173121 - 2³ = 289173113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (289173821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3796 + ... + 24346.

It is an arithmetic number, because the mean of its divisors is an integer number (72301936).

Almost surely, 2^289173121 is an apocalyptic number.

It is an amenable number.

289173121 is a deficient number, since it is larger than the sum of its proper divisors (34623).

289173121 is a wasteful number, since it uses less digits than its factorization.

289173121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34622.

The product of its digits is 6048, while the sum is 34.

The square root of 289173121 is about 17005.0910318057. The cubic root of 289173121 is about 661.2808925168.

The spelling of 289173121 in words is "two hundred eighty-nine million, one hundred seventy-three thousand, one hundred twenty-one".