83489621 has 2 divisors, whose sum is σ = 83489622. Its totient is φ = 83489620.

The previous prime is 83489599. The next prime is 83489647. The reversal of 83489621 is 12698438.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53129521 + 30360100 = 7289^2 + 5510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83489621 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (83489321) 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, 41744810 + 41744811.

It is an arithmetic number, because the mean of its divisors is an integer number (41744811).

Almost surely, 2^83489621 is an apocalyptic number.

It is an amenable number.

83489621 is a deficient number, since it is larger than the sum of its proper divisors (1).

83489621 is an equidigital number, since it uses as much as digits as its factorization.

83489621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82944, while the sum is 41.

The square root of 83489621 is about 9137.2655099871. The cubic root of 83489621 is about 437.0631215473.

The spelling of 83489621 in words is "eighty-three million, four hundred eighty-nine thousand, six hundred twenty-one".