289489943 has 2 divisors, whose sum is σ = 289489944. Its totient is φ = 289489942.

The previous prime is 289489913. The next prime is 289489969. The reversal of 289489943 is 349984982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289489943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (289489913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144744971 + 144744972.

It is an arithmetic number, because the mean of its divisors is an integer number (144744972).

Almost surely, 2^289489943 is an apocalyptic number.

289489943 is a deficient number, since it is larger than the sum of its proper divisors (1).

289489943 is an equidigital number, since it uses as much as digits as its factorization.

289489943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4478976, while the sum is 56.

The square root of 289489943 is about 17014.4039860349. The cubic root of 289489943 is about 661.5223071491.

The spelling of 289489943 in words is "two hundred eighty-nine million, four hundred eighty-nine thousand, nine hundred forty-three".