780430109 has 2 divisors, whose sum is σ = 780430110. Its totient is φ = 780430108.

The previous prime is 780430099. The next prime is 780430171. The reversal of 780430109 is 901034087.

780430109 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 631516900 + 148913209 = 25130^2 + 12203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-780430109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (780430199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390215054 + 390215055.

It is an arithmetic number, because the mean of its divisors is an integer number (390215055).

Almost surely, 2^780430109 is an apocalyptic number.

It is an amenable number.

780430109 is a deficient number, since it is larger than the sum of its proper divisors (1).

780430109 is an equidigital number, since it uses as much as digits as its factorization.

780430109 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 32.

The square root of 780430109 is about 27936.1792126268. The cubic root of 780430109 is about 920.6855747647.

The spelling of 780430109 in words is "seven hundred eighty million, four hundred thirty thousand, one hundred nine".