84645489 has 4 divisors (see below), whose sum is σ = 112860656. Its totient is φ = 56430324.

The previous prime is 84645487. The next prime is 84645521. The reversal of 84645489 is 98454648.

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 not a de Polignac number, because 84645489 - 2¹ = 84645487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84645487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14107579 + ... + 14107584.

It is an arithmetic number, because the mean of its divisors is an integer number (28215164).

Almost surely, 2^84645489 is an apocalyptic number.

It is an amenable number.

84645489 is a deficient number, since it is larger than the sum of its proper divisors (28215167).

84645489 is a wasteful number, since it uses less digits than its factorization.

84645489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28215166.

The product of its digits is 1105920, while the sum is 48.

The square root of 84645489 is about 9200.2983103810. The cubic root of 84645489 is about 439.0708509339.

The spelling of 84645489 in words is "eighty-four million, six hundred forty-five thousand, four hundred eighty-nine".