797105509 has 2 divisors, whose sum is σ = 797105510. Its totient is φ = 797105508.

The previous prime is 797105479. The next prime is 797105539. The reversal of 797105509 is 905501797.

It is a balanced prime because it is at equal distance from previous prime (797105479) and next prime (797105539).

It can be written as a sum of positive squares in only one way, i.e., 643890625 + 153214884 = 25375^2 + 12378^2 .

It is an emirp because it is prime and its reverse (905501797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 797105509 - 2¹⁵ = 797072741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797105539) 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, 398552754 + 398552755.

It is an arithmetic number, because the mean of its divisors is an integer number (398552755).

Almost surely, 2^797105509 is an apocalyptic number.

It is an amenable number.

797105509 is a deficient number, since it is larger than the sum of its proper divisors (1).

797105509 is an equidigital number, since it uses as much as digits as its factorization.

797105509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 99225, while the sum is 43.

The square root of 797105509 is about 28233.0570254091. The cubic root of 797105509 is about 927.1968273128.

The spelling of 797105509 in words is "seven hundred ninety-seven million, one hundred five thousand, five hundred nine".