84169999 has 2 divisors, whose sum is σ = 84170000. Its totient is φ = 84169998.

The previous prime is 84169993. The next prime is 84170027. The reversal of 84169999 is 99996148.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84169999 - 2²¹ = 82072847 is a prime.

It is a Chen prime.

84169999 is a modest number, since divided by 9999 gives 8416 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84169993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42084999 + 42085000.

It is an arithmetic number, because the mean of its divisors is an integer number (42085000).

Almost surely, 2^84169999 is an apocalyptic number.

84169999 is a deficient number, since it is larger than the sum of its proper divisors (1).

84169999 is an equidigital number, since it uses as much as digits as its factorization.

84169999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 55.

The square root of 84169999 is about 9174.4209081555. The cubic root of 84169999 is about 438.2471569212.

The spelling of 84169999 in words is "eighty-four million, one hundred sixty-nine thousand, nine hundred ninety-nine".