9128560897 has 4 divisors (see below), whose sum is σ = 9130416340. Its totient is φ = 9126705456.

The previous prime is 9128560877. The next prime is 9128560937. The reversal of 9128560897 is 7980658219.

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 5966635536 + 3161925361 = 77244^2 + 56231^2 .

It is a cyclic number.

It is not a de Polignac number, because 9128560897 - 2¹⁹ = 9128036609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9128560807) 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, 920322 + ... + 930187.

It is an arithmetic number, because the mean of its divisors is an integer number (2282604085).

Almost surely, 2^9128560897 is an apocalyptic number.

It is an amenable number.

9128560897 is a deficient number, since it is larger than the sum of its proper divisors (1855443).

9128560897 is a wasteful number, since it uses less digits than its factorization.

9128560897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855442.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The square root of 9128560897 is about 95543.5026414669. The cubic root of 9128560897 is about 2089.9413837792.

It can be divided in two parts, 9128 and 560897, that added together give a square (570025 = 755²).

The spelling of 9128560897 in words is "nine billion, one hundred twenty-eight million, five hundred sixty thousand, eight hundred ninety-seven".