80611309 has 2 divisors, whose sum is σ = 80611310. Its totient is φ = 80611308.

The previous prime is 80611301. The next prime is 80611337. The reversal of 80611309 is 90311608.

It is a happy number.

It is an a-pointer prime, because the next prime (80611337) can be obtained adding 80611309 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80048809 + 562500 = 8947^2 + 750^2 .

It is a cyclic number.

It is not a de Polignac number, because 80611309 - 2³ = 80611301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80611301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40305654 + 40305655.

It is an arithmetic number, because the mean of its divisors is an integer number (40305655).

Almost surely, 2^80611309 is an apocalyptic number.

It is an amenable number.

80611309 is a deficient number, since it is larger than the sum of its proper divisors (1).

80611309 is an equidigital number, since it uses as much as digits as its factorization.

80611309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 80611309 is about 8978.3800877441. The cubic root of 80611309 is about 431.9816753916.

The spelling of 80611309 in words is "eighty million, six hundred eleven thousand, three hundred nine".