9766127897 has 4 divisors (see below), whose sum is σ = 9766590900. Its totient is φ = 9765664896.

The previous prime is 9766127893. The next prime is 9766127947. The reversal of 9766127897 is 7987216679.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1349166361 + 8416961536 = 36731^2 + 91744^2 .

It is a cyclic number.

It is not a de Polignac number, because 9766127897 - 2² = 9766127893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9766127893) 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, 198272 + ... + 242577.

It is an arithmetic number, because the mean of its divisors is an integer number (2441647725).

Almost surely, 2^9766127897 is an apocalyptic number.

It is an amenable number.

9766127897 is a deficient number, since it is larger than the sum of its proper divisors (463003).

9766127897 is a wasteful number, since it uses less digits than its factorization.

9766127897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463002.

The product of its digits is 16003008, while the sum is 62.

The square root of 9766127897 is about 98823.7213274222. The cubic root of 9766127897 is about 2137.5066235651.

The spelling of 9766127897 in words is "nine billion, seven hundred sixty-six million, one hundred twenty-seven thousand, eight hundred ninety-seven".