84011609 has 4 divisors (see below), whose sum is σ = 91649040. Its totient is φ = 76374180.

The previous prime is 84011561. The next prime is 84011611. The reversal of 84011609 is 90611048.

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 84011609 - 2⁸ = 84011353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84011309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3818699 + ... + 3818720.

It is an arithmetic number, because the mean of its divisors is an integer number (22912260).

Almost surely, 2^84011609 is an apocalyptic number.

It is an amenable number.

84011609 is a deficient number, since it is larger than the sum of its proper divisors (7637431).

84011609 is a wasteful number, since it uses less digits than its factorization.

84011609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7637430.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 84011609 is about 9165.7846909034. The cubic root of 84011609 is about 437.9720883919.

The spelling of 84011609 in words is "eighty-four million, eleven thousand, six hundred nine".