84170409 has 8 divisors (see below), whose sum is σ = 117106752. Its totient is φ = 53673840.

The previous prime is 84170407. The next prime is 84170431. The reversal of 84170409 is 90407148.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84170409 - 2¹ = 84170407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84170409.

It is not an unprimeable number, because it can be changed into a prime (84170407) 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 7 ways as a sum of consecutive naturals, for example, 609862 + ... + 609999.

It is an arithmetic number, because the mean of its divisors is an integer number (14638344).

Almost surely, 2^84170409 is an apocalyptic number.

It is an amenable number.

84170409 is a deficient number, since it is larger than the sum of its proper divisors (32936343).

84170409 is a wasteful number, since it uses less digits than its factorization.

84170409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219887.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 84170409 is about 9174.4432528628. The cubic root of 84170409 is about 438.2478685011.

The spelling of 84170409 in words is "eighty-four million, one hundred seventy thousand, four hundred nine".