83684147 has 4 divisors (see below), whose sum is σ = 84743520. Its totient is φ = 82624776.

The previous prime is 83684129. The next prime is 83684179. The reversal of 83684147 is 74148638.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83684147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83684197) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 529568 + ... + 529725.

It is an arithmetic number, because the mean of its divisors is an integer number (21185880).

Almost surely, 2^83684147 is an apocalyptic number.

83684147 is a deficient number, since it is larger than the sum of its proper divisors (1059373).

83684147 is a wasteful number, since it uses less digits than its factorization.

83684147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059372.

The product of its digits is 129024, while the sum is 41.

The square root of 83684147 is about 9147.9039675764. The cubic root of 83684147 is about 437.4023022120.

The spelling of 83684147 in words is "eighty-three million, six hundred eighty-four thousand, one hundred forty-seven".