289968739 has 2 divisors, whose sum is σ = 289968740. Its totient is φ = 289968738.

The previous prime is 289968727. The next prime is 289968743. The reversal of 289968739 is 937869982.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 289968739 - 2²¹ = 287871587 is a prime.

It is not a weakly prime, because it can be changed into another prime (289968799) 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, 144984369 + 144984370.

It is an arithmetic number, because the mean of its divisors is an integer number (144984370).

Almost surely, 2^289968739 is an apocalyptic number.

289968739 is a deficient number, since it is larger than the sum of its proper divisors (1).

289968739 is an equidigital number, since it uses as much as digits as its factorization.

289968739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11757312, while the sum is 61.

The square root of 289968739 is about 17028.4684866256. The cubic root of 289968739 is about 661.8868100547.

The spelling of 289968739 in words is "two hundred eighty-nine million, nine hundred sixty-eight thousand, seven hundred thirty-nine".