80644589 has 2 divisors, whose sum is σ = 80644590. Its totient is φ = 80644588.

The previous prime is 80644579. The next prime is 80644643. The reversal of 80644589 is 98544608.

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., 69588964 + 11055625 = 8342^2 + 3325^2 .

It is a cyclic number.

It is not a de Polignac number, because 80644589 - 2⁴ = 80644573 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 (80644579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40322294 + 40322295.

It is an arithmetic number, because the mean of its divisors is an integer number (40322295).

Almost surely, 2^80644589 is an apocalyptic number.

It is an amenable number.

80644589 is a deficient number, since it is larger than the sum of its proper divisors (1).

80644589 is an equidigital number, since it uses as much as digits as its factorization.

80644589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 80644589 is about 8980.2332375056. The cubic root of 80644589 is about 432.0411144140.

The spelling of 80644589 in words is "eighty million, six hundred forty-four thousand, five hundred eighty-nine".