799349989 has 2 divisors, whose sum is σ = 799349990. Its totient is φ = 799349988.

The previous prime is 799349987. The next prime is 799350023. The reversal of 799349989 is 989943997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 792872964 + 6477025 = 28158^2 + 2545^2 .

It is a cyclic number.

It is not a de Polignac number, because 799349989 - 2¹ = 799349987 is a prime.

Together with 799349987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (799349987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 399674994 + 399674995.

It is an arithmetic number, because the mean of its divisors is an integer number (399674995).

Almost surely, 2^799349989 is an apocalyptic number.

It is an amenable number.

799349989 is a deficient number, since it is larger than the sum of its proper divisors (1).

799349989 is an equidigital number, since it uses as much as digits as its factorization.

799349989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39680928, while the sum is 67.

The square root of 799349989 is about 28272.7782327807. The cubic root of 799349989 is about 928.0662749468.

The spelling of 799349989 in words is "seven hundred ninety-nine million, three hundred forty-nine thousand, nine hundred eighty-nine".