83940389 has 16 divisors (see below), whose sum is σ = 92332800. Its totient is φ = 75841920.

The previous prime is 83940377. The next prime is 83940391. The reversal of 83940389 is 98304938.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83940389 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 (83940319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183449 + ... + 183905.

It is an arithmetic number, because the mean of its divisors is an integer number (5770800).

Almost surely, 2^83940389 is an apocalyptic number.

It is an amenable number.

83940389 is a deficient number, since it is larger than the sum of its proper divisors (8392411).

83940389 is a wasteful number, since it uses less digits than its factorization.

83940389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 83940389 is about 9161.8987660856. The cubic root of 83940389 is about 437.8482912524.

The spelling of 83940389 in words is "eighty-three million, nine hundred forty thousand, three hundred eighty-nine".