84409717 has 4 divisors (see below), whose sum is σ = 96468256. Its totient is φ = 72351180.

The previous prime is 84409687. The next prime is 84409727. The reversal of 84409717 is 71790448.

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 a de Polignac number, because none of the positive numbers 2^k-84409717 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 84409717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84409727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6029259 + ... + 6029272.

It is an arithmetic number, because the mean of its divisors is an integer number (24117064).

Almost surely, 2^84409717 is an apocalyptic number.

It is an amenable number.

84409717 is a deficient number, since it is larger than the sum of its proper divisors (12058539).

84409717 is a wasteful number, since it uses less digits than its factorization.

84409717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12058538.

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 84409717 is about 9187.4760952070. The cubic root of 84409717 is about 438.6628084084.

The spelling of 84409717 in words is "eighty-four million, four hundred nine thousand, seven hundred seventeen".