84538709 has 4 divisors (see below), whose sum is σ = 85098720. Its totient is φ = 83978700.

The previous prime is 84538661. The next prime is 84538723. The reversal of 84538709 is 90783548.

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 84538709 - 2²⁴ = 67761493 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84538709.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84538789) 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, 279779 + ... + 280080.

It is an arithmetic number, because the mean of its divisors is an integer number (21274680).

Almost surely, 2^84538709 is an apocalyptic number.

It is an amenable number.

84538709 is a deficient number, since it is larger than the sum of its proper divisors (560011).

84538709 is a wasteful number, since it uses less digits than its factorization.

84538709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560010.

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 84538709 is about 9194.4934063819. The cubic root of 84538709 is about 438.8861444421.

The spelling of 84538709 in words is "eighty-four million, five hundred thirty-eight thousand, seven hundred nine".