9779127697 has 4 divisors (see below), whose sum is σ = 9779874160. Its totient is φ = 9778381236.

The previous prime is 9779127691. The next prime is 9779127731. The reversal of 9779127697 is 7967219779.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9779127697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9779127691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 353223 + ... + 379900.

It is an arithmetic number, because the mean of its divisors is an integer number (2444968540).

Almost surely, 2^9779127697 is an apocalyptic number.

It is an amenable number.

9779127697 is a deficient number, since it is larger than the sum of its proper divisors (746463).

9779127697 is a wasteful number, since it uses less digits than its factorization.

9779127697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746462.

The product of its digits is 21003948, while the sum is 64.

The square root of 9779127697 is about 98889.4721241852. The cubic root of 9779127697 is about 2138.4546225654.

The spelling of 9779127697 in words is "nine billion, seven hundred seventy-nine million, one hundred twenty-seven thousand, six hundred ninety-seven".