799107821 has 2 divisors, whose sum is σ = 799107822. Its totient is φ = 799107820.

The previous prime is 799107811. The next prime is 799107853. The reversal of 799107821 is 128701997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713637796 + 85470025 = 26714^2 + 9245^2 .

It is a cyclic number.

It is not a de Polignac number, because 799107821 - 2¹⁴ = 799091437 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 (799107811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399553910 + 399553911.

It is an arithmetic number, because the mean of its divisors is an integer number (399553911).

Almost surely, 2^799107821 is an apocalyptic number.

It is an amenable number.

799107821 is a deficient number, since it is larger than the sum of its proper divisors (1).

799107821 is an equidigital number, since it uses as much as digits as its factorization.

799107821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 44.

The square root of 799107821 is about 28268.4952022565. The cubic root of 799107821 is about 927.9725443503.

The spelling of 799107821 in words is "seven hundred ninety-nine million, one hundred seven thousand, eight hundred twenty-one".