84465509 has 4 divisors (see below), whose sum is σ = 84766380. Its totient is φ = 84164640.

The previous prime is 84465473. The next prime is 84465559. The reversal of 84465509 is 90556448.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 57912100 + 26553409 = 7610^2 + 5153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84465509 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 (84465559) 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, 150014 + ... + 150575.

It is an arithmetic number, because the mean of its divisors is an integer number (21191595).

Almost surely, 2^84465509 is an apocalyptic number.

It is an amenable number.

84465509 is a deficient number, since it is larger than the sum of its proper divisors (300871).

84465509 is a wasteful number, since it uses less digits than its factorization.

84465509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300870.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 84465509 is about 9190.5119008682. The cubic root of 84465509 is about 438.7594342714.

The spelling of 84465509 in words is "eighty-four million, four hundred sixty-five thousand, five hundred nine".