84775609 has 4 divisors (see below), whose sum is σ = 84946000. Its totient is φ = 84605220.

The previous prime is 84775597. The next prime is 84775637. The reversal of 84775609 is 90657748.

It is a happy number.

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 84775609 - 2¹⁷ = 84644537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84775679) 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, 84447 + ... + 85444.

It is an arithmetic number, because the mean of its divisors is an integer number (21236500).

Almost surely, 2^84775609 is an apocalyptic number.

It is an amenable number.

84775609 is a deficient number, since it is larger than the sum of its proper divisors (170391).

84775609 is a wasteful number, since it uses less digits than its factorization.

84775609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170390.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 84775609 is about 9207.3671046614. The cubic root of 84775609 is about 439.2957207595.

The spelling of 84775609 in words is "eighty-four million, seven hundred seventy-five thousand, six hundred nine".