289133893 has 4 divisors (see below), whose sum is σ = 289298380. Its totient is φ = 288969408.

The previous prime is 289133881. The next prime is 289133941. The reversal of 289133893 is 398331982.

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 183927844 + 105206049 = 13562^2 + 10257^2 .

It is a cyclic number.

It is not a de Polignac number, because 289133893 - 2⁵ = 289133861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (289133813) 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, 79578 + ... + 83131.

It is an arithmetic number, because the mean of its divisors is an integer number (72324595).

Almost surely, 2^289133893 is an apocalyptic number.

It is an amenable number.

289133893 is a deficient number, since it is larger than the sum of its proper divisors (164487).

289133893 is a wasteful number, since it uses less digits than its factorization.

289133893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164486.

The product of its digits is 279936, while the sum is 46.

The square root of 289133893 is about 17003.9375733975. The cubic root of 289133893 is about 661.2509889768.

The spelling of 289133893 in words is "two hundred eighty-nine million, one hundred thirty-three thousand, eight hundred ninety-three".