89005439 has 2 divisors, whose sum is σ = 89005440. Its totient is φ = 89005438.

The previous prime is 89005417. The next prime is 89005447. The reversal of 89005439 is 93450098.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89005439 is a prime.

It is a Sophie Germain 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 (89005459) 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, 44502719 + 44502720.

It is an arithmetic number, because the mean of its divisors is an integer number (44502720).

Almost surely, 2^89005439 is an apocalyptic number.

89005439 is a deficient number, since it is larger than the sum of its proper divisors (1).

89005439 is an equidigital number, since it uses as much as digits as its factorization.

89005439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 89005439 is about 9434.2693940760. The cubic root of 89005439 is about 446.4836044101.

The spelling of 89005439 in words is "eighty-nine million, five thousand, four hundred thirty-nine".