84431573 has 4 divisors (see below), whose sum is σ = 88875360. Its totient is φ = 79987788.

The previous prime is 84431561. The next prime is 84431579. The reversal of 84431573 is 37513448.

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 not a de Polignac number, because 84431573 - 2¹⁸ = 84169429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84431579) 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, 2221865 + ... + 2221902.

It is an arithmetic number, because the mean of its divisors is an integer number (22218840).

Almost surely, 2^84431573 is an apocalyptic number.

It is an amenable number.

84431573 is a deficient number, since it is larger than the sum of its proper divisors (4443787).

84431573 is a wasteful number, since it uses less digits than its factorization.

84431573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4443786.

The product of its digits is 40320, while the sum is 35.

The square root of 84431573 is about 9188.6654634936. The cubic root of 84431573 is about 438.7006657678.

The spelling of 84431573 in words is "eighty-four million, four hundred thirty-one thousand, five hundred seventy-three".