289039957 has 2 divisors, whose sum is σ = 289039958. Its totient is φ = 289039956.

The previous prime is 289039909. The next prime is 289039963. The reversal of 289039957 is 759930982.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 258855921 + 30184036 = 16089^2 + 5494^2 .

It is a cyclic number.

It is not a de Polignac number, because 289039957 - 2¹⁵ = 289007189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289039757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144519978 + 144519979.

It is an arithmetic number, because the mean of its divisors is an integer number (144519979).

Almost surely, 2^289039957 is an apocalyptic number.

It is an amenable number.

289039957 is a deficient number, since it is larger than the sum of its proper divisors (1).

289039957 is an equidigital number, since it uses as much as digits as its factorization.

289039957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 52.

The square root of 289039957 is about 17001.1751652643. The cubic root of 289039957 is about 661.1793704839.

The spelling of 289039957 in words is "two hundred eighty-nine million, thirty-nine thousand, nine hundred fifty-seven".