84009559 has 2 divisors, whose sum is σ = 84009560. Its totient is φ = 84009558.

The previous prime is 84009493. The next prime is 84009577. The reversal of 84009559 is 95590048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84009559 - 2¹³ = 84001367 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 (84009599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42004779 + 42004780.

It is an arithmetic number, because the mean of its divisors is an integer number (42004780).

Almost surely, 2^84009559 is an apocalyptic number.

84009559 is a deficient number, since it is larger than the sum of its proper divisors (1).

84009559 is an equidigital number, since it uses as much as digits as its factorization.

84009559 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 84009559 is about 9165.6728612797. The cubic root of 84009559 is about 437.9685259870.

The spelling of 84009559 in words is "eighty-four million, nine thousand, five hundred fifty-nine".