289916749 has 2 divisors, whose sum is σ = 289916750. Its totient is φ = 289916748.

The previous prime is 289916747. The next prime is 289916773. The reversal of 289916749 is 947619982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180714249 + 109202500 = 13443^2 + 10450^2 .

It is a cyclic number.

It is not a de Polignac number, because 289916749 - 2¹ = 289916747 is a prime.

Together with 289916747, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 289916749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289916747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144958374 + 144958375.

It is an arithmetic number, because the mean of its divisors is an integer number (144958375).

Almost surely, 2^289916749 is an apocalyptic number.

It is an amenable number.

289916749 is a deficient number, since it is larger than the sum of its proper divisors (1).

289916749 is an equidigital number, since it uses as much as digits as its factorization.

289916749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 55.

The square root of 289916749 is about 17026.9418569513. The cubic root of 289916749 is about 661.8472499833.

The spelling of 289916749 in words is "two hundred eighty-nine million, nine hundred sixteen thousand, seven hundred forty-nine".