84674209 has 2 divisors, whose sum is σ = 84674210. Its totient is φ = 84674208.

The previous prime is 84674189. The next prime is 84674243. The reversal of 84674209 is 90247648.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46580625 + 38093584 = 6825^2 + 6172^2 .

It is a cyclic number.

It is not a de Polignac number, because 84674209 - 2⁷ = 84674081 is a prime.

It is a super-3 number, since 3×84674209³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (84677209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42337104 + 42337105.

It is an arithmetic number, because the mean of its divisors is an integer number (42337105).

Almost surely, 2^84674209 is an apocalyptic number.

It is an amenable number.

84674209 is a deficient number, since it is larger than the sum of its proper divisors (1).

84674209 is an equidigital number, since it uses as much as digits as its factorization.

84674209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 84674209 is about 9201.8589969636. The cubic root of 84674209 is about 439.1205038611.

The spelling of 84674209 in words is "eighty-four million, six hundred seventy-four thousand, two hundred nine".