289458689 has 4 divisors (see below), whose sum is σ = 311724756. Its totient is φ = 267192624.

The previous prime is 289458649. The next prime is 289458709. The reversal of 289458689 is 986854982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986854982 = 2 ⋅493427491.

It can be written as a sum of positive squares in 2 ways, for example, as 116273089 + 173185600 = 10783^2 + 13160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289458689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (289458619) 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, 11133014 + ... + 11133039.

It is an arithmetic number, because the mean of its divisors is an integer number (77931189).

Almost surely, 2^289458689 is an apocalyptic number.

It is an amenable number.

289458689 is a deficient number, since it is larger than the sum of its proper divisors (22266067).

289458689 is a wasteful number, since it uses less digits than its factorization.

289458689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22266066.

The product of its digits is 9953280, while the sum is 59.

The square root of 289458689 is about 17013.4855041523. The cubic root of 289458689 is about 661.4984998024.

The spelling of 289458689 in words is "two hundred eighty-nine million, four hundred fifty-eight thousand, six hundred eighty-nine".