289349887 has 2 divisors, whose sum is σ = 289349888. Its totient is φ = 289349886.

The previous prime is 289349873. The next prime is 289349897. The reversal of 289349887 is 788943982.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-289349887 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 (289349807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 144674943 + 144674944.

It is an arithmetic number, because the mean of its divisors is an integer number (144674944).

Almost surely, 2^289349887 is an apocalyptic number.

289349887 is a deficient number, since it is larger than the sum of its proper divisors (1).

289349887 is an equidigital number, since it uses as much as digits as its factorization.

289349887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6967296, while the sum is 58.

The square root of 289349887 is about 17010.2876812828. The cubic root of 289349887 is about 661.4156078596.

The spelling of 289349887 in words is "two hundred eighty-nine million, three hundred forty-nine thousand, eight hundred eighty-seven".