84107609 has 2 divisors, whose sum is σ = 84107610. Its totient is φ = 84107608.

The previous prime is 84107603. The next prime is 84107659. The reversal of 84107609 is 90670148.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 74046025 + 10061584 = 8605^2 + 3172^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84107609 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (84107603) 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, 42053804 + 42053805.

It is an arithmetic number, because the mean of its divisors is an integer number (42053805).

Almost surely, 2^84107609 is an apocalyptic number.

It is an amenable number.

84107609 is a deficient number, since it is larger than the sum of its proper divisors (1).

84107609 is an equidigital number, since it uses as much as digits as its factorization.

84107609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 84107609 is about 9171.0200632209. The cubic root of 84107609 is about 438.1388483436.

The spelling of 84107609 in words is "eighty-four million, one hundred seven thousand, six hundred nine".