289418321 has 2 divisors, whose sum is σ = 289418322. Its totient is φ = 289418320.

The previous prime is 289418309. The next prime is 289418333. The reversal of 289418321 is 123814982.

It is a balanced prime because it is at equal distance from previous prime (289418309) and next prime (289418333).

It can be written as a sum of positive squares in only one way, i.e., 220195921 + 69222400 = 14839^2 + 8320^2 .

It is a cyclic number.

It is not a de Polignac number, because 289418321 - 2⁶ = 289418257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (289468321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144709160 + 144709161.

It is an arithmetic number, because the mean of its divisors is an integer number (144709161).

Almost surely, 2^289418321 is an apocalyptic number.

It is an amenable number.

289418321 is a deficient number, since it is larger than the sum of its proper divisors (1).

289418321 is an equidigital number, since it uses as much as digits as its factorization.

289418321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 38.

The square root of 289418321 is about 17012.2991097617. The cubic root of 289418321 is about 661.4677474431.

The spelling of 289418321 in words is "two hundred eighty-nine million, four hundred eighteen thousand, three hundred twenty-one".