409080779 has 2 divisors, whose sum is σ = 409080780. Its totient is φ = 409080778.

The previous prime is 409080751. The next prime is 409080781. The reversal of 409080779 is 977080904.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-409080779 is a prime.

Together with 409080781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (409080079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204540389 + 204540390.

It is an arithmetic number, because the mean of its divisors is an integer number (204540390).

Almost surely, 2^409080779 is an apocalyptic number.

409080779 is a deficient number, since it is larger than the sum of its proper divisors (1).

409080779 is an equidigital number, since it uses as much as digits as its factorization.

409080779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 127008, while the sum is 44.

The square root of 409080779 is about 20225.7454497974. The cubic root of 409080779 is about 742.3402772521.

The spelling of 409080779 in words is "four hundred nine million, eighty thousand, seven hundred seventy-nine".