784480009 has 2 divisors, whose sum is σ = 784480010. Its totient is φ = 784480008.

The previous prime is 784480001. The next prime is 784480027. The reversal of 784480009 is 900084487.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 674544784 + 109935225 = 25972^2 + 10485^2 .

It is a cyclic number.

It is not a de Polignac number, because 784480009 - 2³ = 784480001 is a prime.

It is not a weakly prime, because it can be changed into another prime (784480001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392240004 + 392240005.

It is an arithmetic number, because the mean of its divisors is an integer number (392240005).

Almost surely, 2^784480009 is an apocalyptic number.

It is an amenable number.

784480009 is a deficient number, since it is larger than the sum of its proper divisors (1).

784480009 is an equidigital number, since it uses as much as digits as its factorization.

784480009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 784480009 is about 28008.5702776847. The cubic root of 784480009 is about 922.2754046205.

The spelling of 784480009 in words is "seven hundred eighty-four million, four hundred eighty thousand, nine".