84531579 has 16 divisors (see below), whose sum is σ = 123118464. Its totient is φ = 51163200.

The previous prime is 84531553. The next prime is 84531631. The reversal of 84531579 is 97513548.

It is not a de Polignac number, because 84531579 - 2⁹ = 84531067 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 84531579.

It is not an unprimeable number, because it can be changed into a prime (84538579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35919 + ... + 38199.

It is an arithmetic number, because the mean of its divisors is an integer number (7694904).

Almost surely, 2^84531579 is an apocalyptic number.

84531579 is a deficient number, since it is larger than the sum of its proper divisors (38586885).

84531579 is a wasteful number, since it uses less digits than its factorization.

84531579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3418.

The product of its digits is 151200, while the sum is 42.

The square root of 84531579 is about 9194.1056661320. The cubic root of 84531579 is about 438.8738055336.

The spelling of 84531579 in words is "eighty-four million, five hundred thirty-one thousand, five hundred seventy-nine".