84124609 has 4 divisors (see below), whose sum is σ = 88552240. Its totient is φ = 79696980.

The previous prime is 84124589. The next prime is 84124631. The reversal of 84124609 is 90642148.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84124609 - 2⁹ = 84124097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84124009) 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 in 3 ways as a sum of consecutive naturals, for example, 2213787 + ... + 2213824.

It is an arithmetic number, because the mean of its divisors is an integer number (22138060).

Almost surely, 2^84124609 is an apocalyptic number.

It is an amenable number.

84124609 is a deficient number, since it is larger than the sum of its proper divisors (4427631).

84124609 is a wasteful number, since it uses less digits than its factorization.

84124609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4427630.

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

The square root of 84124609 is about 9171.9468489520. The cubic root of 84124609 is about 438.1683655250.

The spelling of 84124609 in words is "eighty-four million, one hundred twenty-four thousand, six hundred nine".