83686005 has 24 divisors (see below), whose sum is σ = 156214968. Its totient is φ = 41198976.

The previous prime is 83685997. The next prime is 83686021. The reversal of 83686005 is 50068638.

It can be written as a sum of positive squares in 4 ways, for example, as 18173169 + 65512836 = 4263^2 + 8094^2 .

It is not a de Polignac number, because 83686005 - 2³ = 83685997 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70942 + ... + 72111.

It is an arithmetic number, because the mean of its divisors is an integer number (6508957).

Almost surely, 2^83686005 is an apocalyptic number.

It is an amenable number.

83686005 is a deficient number, since it is larger than the sum of its proper divisors (72528963).

83686005 is a wasteful number, since it uses less digits than its factorization.

83686005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143077 (or 143074 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 83686005 is about 9148.0055203306. The cubic root of 83686005 is about 437.4055393343.

The spelling of 83686005 in words is "eighty-three million, six hundred eighty-six thousand, five".