800738698009 has 2 divisors, whose sum is σ = 800738698010. Its totient is φ = 800738698008.

The previous prime is 800738698007. The next prime is 800738698037. The reversal of 800738698009 is 900896837008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 739648160784 + 61090537225 = 860028^2 + 247165^2 .

It is a cyclic number.

It is not a de Polignac number, because 800738698009 - 2¹ = 800738698007 is a prime.

Together with 800738698007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (800738698007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400369349004 + 400369349005.

It is an arithmetic number, because the mean of its divisors is an integer number (400369349005).

Almost surely, 2^800738698009 is an apocalyptic number.

It is an amenable number.

800738698009 is a deficient number, since it is larger than the sum of its proper divisors (1).

800738698009 is an equidigital number, since it uses as much as digits as its factorization.

800738698009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5225472, while the sum is 58.

The spelling of 800738698009 in words is "eight hundred billion, seven hundred thirty-eight million, six hundred ninety-eight thousand, nine".