84464639 has 4 divisors (see below), whose sum is σ = 96531024. Its totient is φ = 72398256.

The previous prime is 84464621. The next prime is 84464663. The reversal of 84464639 is 93646448.

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

It is not a de Polignac number, because 84464639 - 2⁸ = 84464383 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 84464639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84464609) 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, 6033182 + ... + 6033195.

It is an arithmetic number, because the mean of its divisors is an integer number (24132756).

Almost surely, 2^84464639 is an apocalyptic number.

84464639 is a deficient number, since it is larger than the sum of its proper divisors (12066385).

84464639 is a wasteful number, since it uses less digits than its factorization.

84464639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12066384.

The product of its digits is 497664, while the sum is 44.

The square root of 84464639 is about 9190.4645693240. The cubic root of 84464639 is about 438.7579278498.

The spelling of 84464639 in words is "eighty-four million, four hundred sixty-four thousand, six hundred thirty-nine".