289408145 has 8 divisors (see below), whose sum is σ = 374004456. Its totient is φ = 213716736.

The previous prime is 289408129. The next prime is 289408177. The reversal of 289408145 is 541804982.

It is a Cunningham number, because it is equal to 17012²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 289408144 = 1^2 + 17012^2 .

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 289408145 - 2⁴ = 289408129 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2226152 + ... + 2226281.

It is an arithmetic number, because the mean of its divisors is an integer number (46750557).

Almost surely, 2^289408145 is an apocalyptic number.

It is an amenable number.

289408145 is a deficient number, since it is larger than the sum of its proper divisors (84596311).

289408145 is a wasteful number, since it uses less digits than its factorization.

289408145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4452451.

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 289408145 is about 17012.0000293910. Note that the first 4 decimals coincide. The cubic root of 289408145 is about 661.4599949107.

The spelling of 289408145 in words is "two hundred eighty-nine million, four hundred eight thousand, one hundred forty-five".