84834209 has 2 divisors, whose sum is σ = 84834210. Its totient is φ = 84834208.

The previous prime is 84834173. The next prime is 84834247. The reversal of 84834209 is 90243848.

It is an a-pointer prime, because the next prime (84834247) can be obtained adding 84834209 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 55457809 + 29376400 = 7447^2 + 5420^2 .

It is a cyclic number.

It is not a de Polignac number, because 84834209 - 2⁸ = 84833953 is a prime.

It is equal to p_4934684 and since 84834209 and 4934684 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (84864209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42417104 + 42417105.

It is an arithmetic number, because the mean of its divisors is an integer number (42417105).

Almost surely, 2^84834209 is an apocalyptic number.

It is an amenable number.

84834209 is a deficient number, since it is larger than the sum of its proper divisors (1).

84834209 is an equidigital number, since it uses as much as digits as its factorization.

84834209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 84834209 is about 9210.5487892959. The cubic root of 84834209 is about 439.3969165334.

The spelling of 84834209 in words is "eighty-four million, eight hundred thirty-four thousand, two hundred nine".