289221393 has 8 divisors (see below), whose sum is σ = 385770528. Its totient is φ = 192743264.

The previous prime is 289221349. The next prime is 289221433. The reversal of 289221393 is 393122982.

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 289221393 - 2⁶ = 289221329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (289222393) 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 7 ways as a sum of consecutive naturals, for example, 7380 + ... + 25157.

It is an arithmetic number, because the mean of its divisors is an integer number (48221316).

Almost surely, 2^289221393 is an apocalyptic number.

It is an amenable number.

289221393 is a deficient number, since it is larger than the sum of its proper divisors (96549135).

289221393 is a wasteful number, since it uses less digits than its factorization.

289221393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35503.

The product of its digits is 46656, while the sum is 39.

The square root of 289221393 is about 17006.5103122304. The cubic root of 289221393 is about 661.3176865948.

The spelling of 289221393 in words is "two hundred eighty-nine million, two hundred twenty-one thousand, three hundred ninety-three".