997530759909 has 6 divisors (see below), whose sum is σ = 1440877764326. Its totient is φ = 665020506600.

The previous prime is 997530759871. The next prime is 997530759931. The reversal of 997530759909 is 909957035799.

It can be written as a sum of positive squares in only one way, i.e., 898732440225 + 98798319684 = 948015^2 + 314322^2 .

It is not a de Polignac number, because 997530759909 - 2¹³ = 997530751717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997530759209) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 55418375542 + ... + 55418375559.

Almost surely, 2^997530759909 is an apocalyptic number.

It is an amenable number.

997530759909 is a deficient number, since it is larger than the sum of its proper divisors (443347004417).

997530759909 is a wasteful number, since it uses less digits than its factorization.

997530759909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110836751107 (or 110836751104 counting only the distinct ones).

The product of its (nonzero) digits is 217005075, while the sum is 72.

The spelling of 997530759909 in words is "nine hundred ninety-seven billion, five hundred thirty million, seven hundred fifty-nine thousand, nine hundred nine".