84214609 has 2 divisors, whose sum is σ = 84214610. Its totient is φ = 84214608.

The previous prime is 84214567. The next prime is 84214619. The reversal of 84214609 is 90641248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 78588225 + 5626384 = 8865^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 84214609 - 2¹¹ = 84212561 is a prime.

It is not a weakly prime, because it can be changed into another prime (84214619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42107304 + 42107305.

It is an arithmetic number, because the mean of its divisors is an integer number (42107305).

Almost surely, 2^84214609 is an apocalyptic number.

It is an amenable number.

84214609 is a deficient number, since it is larger than the sum of its proper divisors (1).

84214609 is an equidigital number, since it uses as much as digits as its factorization.

84214609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 84214609 is about 9176.8518022250. The cubic root of 84214609 is about 438.3245667389.

It can be divided in two parts, 842 and 14609, that added together give a palindrome (15451).

The spelling of 84214609 in words is "eighty-four million, two hundred fourteen thousand, six hundred nine".