799864517 has 2 divisors, whose sum is σ = 799864518. Its totient is φ = 799864516.

The previous prime is 799864469. The next prime is 799864547. The reversal of 799864517 is 715468997.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 744525796 + 55338721 = 27286^2 + 7439^2 .

It is a cyclic number.

It is not a de Polignac number, because 799864517 - 2⁶ = 799864453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (799864547) 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, 399932258 + 399932259.

It is an arithmetic number, because the mean of its divisors is an integer number (399932259).

Almost surely, 2^799864517 is an apocalyptic number.

It is an amenable number.

799864517 is a deficient number, since it is larger than the sum of its proper divisors (1).

799864517 is an equidigital number, since it uses as much as digits as its factorization.

799864517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 56.

The square root of 799864517 is about 28281.8761223509. The cubic root of 799864517 is about 928.2653590656.

The spelling of 799864517 in words is "seven hundred ninety-nine million, eight hundred sixty-four thousand, five hundred seventeen".