80118809 has 2 divisors, whose sum is σ = 80118810. Its totient is φ = 80118808.

The previous prime is 80118769. The next prime is 80118823. The reversal of 80118809 is 90881108.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61387225 + 18731584 = 7835^2 + 4328^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80118809 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (80118509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40059404 + 40059405.

It is an arithmetic number, because the mean of its divisors is an integer number (40059405).

Almost surely, 2^80118809 is an apocalyptic number.

It is an amenable number.

80118809 is a deficient number, since it is larger than the sum of its proper divisors (1).

80118809 is an equidigital number, since it uses as much as digits as its factorization.

80118809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 35.

The square root of 80118809 is about 8950.9110709469. The cubic root of 80118809 is about 431.1001376919.

The spelling of 80118809 in words is "eighty million, one hundred eighteen thousand, eight hundred nine".