80801689 has 2 divisors, whose sum is σ = 80801690. Its totient is φ = 80801688.

The previous prime is 80801681. The next prime is 80801723. The reversal of 80801689 is 98610808.

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., 43494025 + 37307664 = 6595^2 + 6108^2 .

It is a cyclic number.

It is not a de Polignac number, because 80801689 - 2³ = 80801681 is a prime.

It is not a weakly prime, because it can be changed into another prime (80801681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40400844 + 40400845.

It is an arithmetic number, because the mean of its divisors is an integer number (40400845).

Almost surely, 2^80801689 is an apocalyptic number.

It is an amenable number.

80801689 is a deficient number, since it is larger than the sum of its proper divisors (1).

80801689 is an equidigital number, since it uses as much as digits as its factorization.

80801689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 80801689 is about 8988.9759705987. The cubic root of 80801689 is about 432.3214788861.

The spelling of 80801689 in words is "eighty million, eight hundred one thousand, six hundred eighty-nine".