289020749 has 2 divisors, whose sum is σ = 289020750. Its totient is φ = 289020748.

The previous prime is 289020733. The next prime is 289020769. The reversal of 289020749 is 947020982.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154878025 + 134142724 = 12445^2 + 11582^2 .

It is a cyclic number.

It is not a de Polignac number, because 289020749 - 2⁴ = 289020733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289020769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144510374 + 144510375.

It is an arithmetic number, because the mean of its divisors is an integer number (144510375).

Almost surely, 2^289020749 is an apocalyptic number.

It is an amenable number.

289020749 is a deficient number, since it is larger than the sum of its proper divisors (1).

289020749 is an equidigital number, since it uses as much as digits as its factorization.

289020749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 289020749 is about 17000.6102537527. The cubic root of 289020749 is about 661.1647240491.

The spelling of 289020749 in words is "two hundred eighty-nine million, twenty thousand, seven hundred forty-nine".