289194121 has 2 divisors, whose sum is σ = 289194122. Its totient is φ = 289194120.

The previous prime is 289194091. The next prime is 289194137. The reversal of 289194121 is 121491982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 280194121 + 9000000 = 16739^2 + 3000^2 .

It is a cyclic number.

It is not a de Polignac number, because 289194121 - 2¹⁹ = 288669833 is a prime.

It is not a weakly prime, because it can be changed into another prime (289194721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144597060 + 144597061.

It is an arithmetic number, because the mean of its divisors is an integer number (144597061).

Almost surely, 2^289194121 is an apocalyptic number.

It is an amenable number.

289194121 is a deficient number, since it is larger than the sum of its proper divisors (1).

289194121 is an equidigital number, since it uses as much as digits as its factorization.

289194121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 37.

The square root of 289194121 is about 17005.7084827419. The cubic root of 289194121 is about 661.2968997244.

The spelling of 289194121 in words is "two hundred eighty-nine million, one hundred ninety-four thousand, one hundred twenty-one".