83940647 has 8 divisors (see below), whose sum is σ = 96009600. Its totient is φ = 71891064.

The previous prime is 83940641. The next prime is 83940667. The reversal of 83940647 is 74604938.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 83940647 - 2⁸ = 83940391 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 (83940641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6104 + ... + 14322.

It is an arithmetic number, because the mean of its divisors is an integer number (12001200).

Almost surely, 2^83940647 is an apocalyptic number.

83940647 is a deficient number, since it is larger than the sum of its proper divisors (12068953).

83940647 is a wasteful number, since it uses less digits than its factorization.

83940647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9685.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 83940647 is about 9161.9128461255. The cubic root of 83940647 is about 437.8487398435.

The spelling of 83940647 in words is "eighty-three million, nine hundred forty thousand, six hundred forty-seven".