80340409 has 2 divisors, whose sum is σ = 80340410. Its totient is φ = 80340408.

The previous prime is 80340397. The next prime is 80340413. The reversal of 80340409 is 90404308.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80048809 + 291600 = 8947^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 80340409 - 2²¹ = 78243257 is a prime.

It is not a weakly prime, because it can be changed into another prime (80340439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40170204 + 40170205.

It is an arithmetic number, because the mean of its divisors is an integer number (40170205).

Almost surely, 2^80340409 is an apocalyptic number.

It is an amenable number.

80340409 is a deficient number, since it is larger than the sum of its proper divisors (1).

80340409 is an equidigital number, since it uses as much as digits as its factorization.

80340409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 80340409 is about 8963.2811514534. The cubic root of 80340409 is about 431.4972306672.

The spelling of 80340409 in words is "eighty million, three hundred forty thousand, four hundred nine".