814723109 has 2 divisors, whose sum is σ = 814723110. Its totient is φ = 814723108.

The previous prime is 814723087. The next prime is 814723127. The reversal of 814723109 is 901327418.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 713157025 + 101566084 = 26705^2 + 10078^2 .

It is a cyclic number.

It is not a de Polignac number, because 814723109 - 2¹⁶ = 814657573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (814723139) 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, 407361554 + 407361555.

It is an arithmetic number, because the mean of its divisors is an integer number (407361555).

Almost surely, 2^814723109 is an apocalyptic number.

It is an amenable number.

814723109 is a deficient number, since it is larger than the sum of its proper divisors (1).

814723109 is an equidigital number, since it uses as much as digits as its factorization.

814723109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 814723109 is about 28543.3549009222. The cubic root of 814723109 is about 933.9780684538.

The spelling of 814723109 in words is "eight hundred fourteen million, seven hundred twenty-three thousand, one hundred nine".