80818589 has 2 divisors, whose sum is σ = 80818590. Its totient is φ = 80818588.

The previous prime is 80818541. The next prime is 80818601. The reversal of 80818589 is 98581808.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79798489 + 1020100 = 8933^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 80818589 - 2¹⁶ = 80753053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80818189) 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, 40409294 + 40409295.

It is an arithmetic number, because the mean of its divisors is an integer number (40409295).

Almost surely, 2^80818589 is an apocalyptic number.

It is an amenable number.

80818589 is a deficient number, since it is larger than the sum of its proper divisors (1).

80818589 is an equidigital number, since it uses as much as digits as its factorization.

80818589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 184320, while the sum is 47.

The square root of 80818589 is about 8989.9159617874. The cubic root of 80818589 is about 432.3516173801.

The spelling of 80818589 in words is "eighty million, eight hundred eighteen thousand, five hundred eighty-nine".