289039243 has 2 divisors, whose sum is σ = 289039244. Its totient is φ = 289039242.

The previous prime is 289039211. The next prime is 289039271. The reversal of 289039243 is 342930982.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 289039243 - 2⁵ = 289039211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 289039196 and 289039205.

It is not a weakly prime, because it can be changed into another prime (289099243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144519621 + 144519622.

It is an arithmetic number, because the mean of its divisors is an integer number (144519622).

Almost surely, 2^289039243 is an apocalyptic number.

289039243 is a deficient number, since it is larger than the sum of its proper divisors (1).

289039243 is an equidigital number, since it uses as much as digits as its factorization.

289039243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 289039243 is about 17001.1541667029. The cubic root of 289039243 is about 661.1788260581.

The spelling of 289039243 in words is "two hundred eighty-nine million, thirty-nine thousand, two hundred forty-three".