83980789 has 2 divisors, whose sum is σ = 83980790. Its totient is φ = 83980788.

The previous prime is 83980759. The next prime is 83980801. The reversal of 83980789 is 98708938.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77000625 + 6980164 = 8775^2 + 2642^2 .

It is a cyclic number.

It is not a de Polignac number, because 83980789 - 2⁹ = 83980277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83980759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41990394 + 41990395.

It is an arithmetic number, because the mean of its divisors is an integer number (41990395).

Almost surely, 2^83980789 is an apocalyptic number.

It is an amenable number.

83980789 is a deficient number, since it is larger than the sum of its proper divisors (1).

83980789 is an equidigital number, since it uses as much as digits as its factorization.

83980789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 83980789 is about 9164.1032840098. The cubic root of 83980789 is about 437.9185245614.

The spelling of 83980789 in words is "eighty-three million, nine hundred eighty thousand, seven hundred eighty-nine".