84636505 has 16 divisors (see below), whose sum is σ = 104661648. Its totient is φ = 65664000.

The previous prime is 84636457. The next prime is 84636521. The reversal of 84636505 is 50563648.

It can be written as a sum of positive squares in 8 ways, for example, as 30349081 + 54287424 = 5509^2 + 7368^2 .

It is not a de Polignac number, because 84636505 - 2¹⁷ = 84505433 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35965 + ... + 38245.

It is an arithmetic number, because the mean of its divisors is an integer number (6541353).

Almost surely, 2^84636505 is an apocalyptic number.

It is an amenable number.

84636505 is a deficient number, since it is larger than the sum of its proper divisors (20025143).

84636505 is a wasteful number, since it uses less digits than its factorization.

84636505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2508.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 84636505 is about 9199.8100523870. The cubic root of 84636505 is about 439.0553165282.

The spelling of 84636505 in words is "eighty-four million, six hundred thirty-six thousand, five hundred five".