289843949 has 2 divisors, whose sum is σ = 289843950. Its totient is φ = 289843948.

The previous prime is 289843891. The next prime is 289843963. The reversal of 289843949 is 949348982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228221449 + 61622500 = 15107^2 + 7850^2 .

It is a cyclic number.

It is not a de Polignac number, because 289843949 - 2²⁸ = 21408493 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 289843894 and 289843903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289843979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144921974 + 144921975.

It is an arithmetic number, because the mean of its divisors is an integer number (144921975).

Almost surely, 2^289843949 is an apocalyptic number.

It is an amenable number.

289843949 is a deficient number, since it is larger than the sum of its proper divisors (1).

289843949 is an equidigital number, since it uses as much as digits as its factorization.

289843949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4478976, while the sum is 56.

The square root of 289843949 is about 17024.8039342602. The cubic root of 289843949 is about 661.7918472818.

The spelling of 289843949 in words is "two hundred eighty-nine million, eight hundred forty-three thousand, nine hundred forty-nine".