799214971909 has 2 divisors, whose sum is σ = 799214971910. Its totient is φ = 799214971908.

The previous prime is 799214971903. The next prime is 799214971981. The reversal of 799214971909 is 909179412997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 683680922500 + 115534049409 = 826850^2 + 339903^2 .

It is a cyclic number.

It is not a de Polignac number, because 799214971909 - 2⁷ = 799214971781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (799214971903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399607485954 + 399607485955.

It is an arithmetic number, because the mean of its divisors is an integer number (399607485955).

Almost surely, 2^799214971909 is an apocalyptic number.

It is an amenable number.

799214971909 is a deficient number, since it is larger than the sum of its proper divisors (1).

799214971909 is an equidigital number, since it uses as much as digits as its factorization.

799214971909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23147208, while the sum is 67.

The spelling of 799214971909 in words is "seven hundred ninety-nine billion, two hundred fourteen million, nine hundred seventy-one thousand, nine hundred nine".