814705919 has 2 divisors, whose sum is σ = 814705920. Its totient is φ = 814705918.

The previous prime is 814705873. The next prime is 814705933. The reversal of 814705919 is 919507418.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 814705919 - 2⁸ = 814705663 is a prime.

It is a super-2 number, since 2×814705919² = 1327491468907269122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 814705919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (814705979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407352959 + 407352960.

It is an arithmetic number, because the mean of its divisors is an integer number (407352960).

Almost surely, 2^814705919 is an apocalyptic number.

814705919 is a deficient number, since it is larger than the sum of its proper divisors (1).

814705919 is an equidigital number, since it uses as much as digits as its factorization.

814705919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 814705919 is about 28543.0537784590. The cubic root of 814705919 is about 933.9714996798.

The spelling of 814705919 in words is "eight hundred fourteen million, seven hundred five thousand, nine hundred nineteen".