84905959 has 2 divisors, whose sum is σ = 84905960. Its totient is φ = 84905958.

The previous prime is 84905917. The next prime is 84905963. The reversal of 84905959 is 95950948.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84905959 - 2⁷ = 84905831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84905969) 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, 42452979 + 42452980.

It is an arithmetic number, because the mean of its divisors is an integer number (42452980).

Almost surely, 2^84905959 is an apocalyptic number.

84905959 is a deficient number, since it is larger than the sum of its proper divisors (1).

84905959 is an equidigital number, since it uses as much as digits as its factorization.

84905959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 583200, while the sum is 49.

The square root of 84905959 is about 9214.4429565764. The cubic root of 84905959 is about 439.5207574745.

The spelling of 84905959 in words is "eighty-four million, nine hundred five thousand, nine hundred fifty-nine".