80730409 has 2 divisors, whose sum is σ = 80730410. Its totient is φ = 80730408.

The previous prime is 80730407. The next prime is 80730431. The reversal of 80730409 is 90403708.

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., 43520409 + 37210000 = 6597^2 + 6100^2 .

It is a cyclic number.

It is not a de Polignac number, because 80730409 - 2¹ = 80730407 is a prime.

Together with 80730407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (80730407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40365204 + 40365205.

It is an arithmetic number, because the mean of its divisors is an integer number (40365205).

Almost surely, 2^80730409 is an apocalyptic number.

It is an amenable number.

80730409 is a deficient number, since it is larger than the sum of its proper divisors (1).

80730409 is an equidigital number, since it uses as much as digits as its factorization.

80730409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 80730409 is about 8985.0102392819. The cubic root of 80730409 is about 432.1943159462.

The spelling of 80730409 in words is "eighty million, seven hundred thirty thousand, four hundred nine".