784561097 has 2 divisors, whose sum is σ = 784561098. Its totient is φ = 784561096.

The previous prime is 784561081. The next prime is 784561103. The reversal of 784561097 is 790165487.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 741146176 + 43414921 = 27224^2 + 6589^2 .

It is an emirp because it is prime and its reverse (790165487) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 784561097 - 2⁴ = 784561081 is a prime.

It is a super-3 number, since 3×784561097³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (784561007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392280548 + 392280549.

It is an arithmetic number, because the mean of its divisors is an integer number (392280549).

Almost surely, 2^784561097 is an apocalyptic number.

It is an amenable number.

784561097 is a deficient number, since it is larger than the sum of its proper divisors (1).

784561097 is an equidigital number, since it uses as much as digits as its factorization.

784561097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 784561097 is about 28010.0177972096. The cubic root of 784561097 is about 922.3071806125.

The spelling of 784561097 in words is "seven hundred eighty-four million, five hundred sixty-one thousand, ninety-seven".