84165407 has 4 divisors (see below), whose sum is σ = 84289320. Its totient is φ = 84041496.

The previous prime is 84165397. The next prime is 84165427. The reversal of 84165407 is 70456148.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84165407 - 2¹⁸ = 83903263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84165427) 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, 60932 + ... + 62297.

It is an arithmetic number, because the mean of its divisors is an integer number (21072330).

Almost surely, 2^84165407 is an apocalyptic number.

84165407 is a deficient number, since it is larger than the sum of its proper divisors (123913).

84165407 is a wasteful number, since it uses less digits than its factorization.

84165407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123912.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 84165407 is about 9174.1706437149. The cubic root of 84165407 is about 438.2391870683.

The spelling of 84165407 in words is "eighty-four million, one hundred sixty-five thousand, four hundred seven".