799943797 has 2 divisors, whose sum is σ = 799943798. Its totient is φ = 799943796.

The previous prime is 799943779. The next prime is 799943821. The reversal of 799943797 is 797349997.

It is a happy number.

Together with previous prime (799943779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 675532081 + 124411716 = 25991^2 + 11154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-799943797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (799953797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399971898 + 399971899.

It is an arithmetic number, because the mean of its divisors is an integer number (399971899).

Almost surely, 2^799943797 is an apocalyptic number.

It is an amenable number.

799943797 is a deficient number, since it is larger than the sum of its proper divisors (1).

799943797 is an equidigital number, since it uses as much as digits as its factorization.

799943797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27005076, while the sum is 64.

The square root of 799943797 is about 28283.2776919508. The cubic root of 799943797 is about 928.2960269453.

The spelling of 799943797 in words is "seven hundred ninety-nine million, nine hundred forty-three thousand, seven hundred ninety-seven".