9659779497 has 24 divisors (see below), whose sum is σ = 14556499776. Its totient is φ = 6401264112.

The previous prime is 9659779483. The next prime is 9659779517. The reversal of 9659779497 is 7949779569.

9659779497 is a `hidden beast` number, since 9 + 65 + 9 + 7 + 79 + 497 = 666.

9659779497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9659779497 - 2⁷ = 9659779369 is a prime.

It is a super-2 number, since 2×9659779497² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9659779697) 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 in 23 ways as a sum of consecutive naturals, for example, 78438 + ... + 159599.

It is an arithmetic number, because the mean of its divisors is an integer number (606520824).

Almost surely, 2^9659779497 is an apocalyptic number.

It is an amenable number.

9659779497 is a deficient number, since it is larger than the sum of its proper divisors (4896720279).

9659779497 is a wasteful number, since it uses less digits than its factorization.

9659779497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238219 (or 238207 counting only the distinct ones).

The product of its digits is 270050760, while the sum is 72.

The square root of 9659779497 is about 98284.1772463910. The cubic root of 9659779497 is about 2129.7194849788.

Adding to 9659779497 its sum of digits (72), we get a palindrome (9659779569).

The spelling of 9659779497 in words is "nine billion, six hundred fifty-nine million, seven hundred seventy-nine thousand, four hundred ninety-seven".