84455447 has 4 divisors (see below), whose sum is σ = 86049000. Its totient is φ = 82861896.

The previous prime is 84455419. The next prime is 84455461. The reversal of 84455447 is 74455448.

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

It is not a de Polignac number, because 84455447 - 2⁶ = 84455383 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 (84455417) 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, 796697 + ... + 796802.

It is an arithmetic number, because the mean of its divisors is an integer number (21512250).

Almost surely, 2^84455447 is an apocalyptic number.

84455447 is a deficient number, since it is larger than the sum of its proper divisors (1593553).

84455447 is a wasteful number, since it uses less digits than its factorization.

84455447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1593552.

The product of its digits is 358400, while the sum is 41.

The square root of 84455447 is about 9189.9644721838. The cubic root of 84455447 is about 438.7420110936.

Subtracting from 84455447 its reverse (74455448), we obtain a palindrome (9999999).

The spelling of 84455447 in words is "eighty-four million, four hundred fifty-five thousand, four hundred forty-seven".