83705389 has 2 divisors, whose sum is σ = 83705390. Its totient is φ = 83705388.

The previous prime is 83705387. The next prime is 83705407. The reversal of 83705389 is 98350738.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51408900 + 32296489 = 7170^2 + 5683^2 .

It is a cyclic number.

It is not a de Polignac number, because 83705389 - 2¹ = 83705387 is a prime.

Together with 83705387, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83705381) 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 as a sum of consecutive naturals, namely, 41852694 + 41852695.

It is an arithmetic number, because the mean of its divisors is an integer number (41852695).

Almost surely, 2^83705389 is an apocalyptic number.

It is an amenable number.

83705389 is a deficient number, since it is larger than the sum of its proper divisors (1).

83705389 is an equidigital number, since it uses as much as digits as its factorization.

83705389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 83705389 is about 9149.0649248981. The cubic root of 83705389 is about 437.4393084790.

The spelling of 83705389 in words is "eighty-three million, seven hundred five thousand, three hundred eighty-nine".