289091 has 8 divisors (see below), whose sum is σ = 323568. Its totient is φ = 256000.

The previous prime is 289067. The next prime is 289099. The reversal of 289091 is 190982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a 11-Lehmer number, since φ(289091) divides (289091-1)¹¹.

It is a cyclic number.

It is not a de Polignac number, because 289091 - 2¹⁸ = 26947 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 289091.

It is not an unprimeable number, because it can be changed into a prime (289099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131 + ... + 771.

It is an arithmetic number, because the mean of its divisors is an integer number (40446).

2²⁸⁹⁰⁹¹ is an apocalyptic number.

289091 is a deficient number, since it is larger than the sum of its proper divisors (34477).

289091 is a wasteful number, since it uses less digits than its factorization.

289091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 289091 is about 537.6718329985. The cubic root of 289091 is about 66.1218288508.

It can be divided in two parts, 28 and 9091, that added together give a palindrome (9119).

The spelling of 289091 in words is "two hundred eighty-nine thousand, ninety-one".