297288085681 has 4 divisors (see below), whose sum is σ = 297293481252. Its totient is φ = 297282690112.

The previous prime is 297288085649. The next prime is 297288085697. The reversal of 297288085681 is 186580882792.

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 129502818225 + 167785267456 = 359865^2 + 409616^2 .

It is a cyclic number.

It is not a de Polignac number, because 297288085681 - 2⁵ = 297288085649 is a prime.

It is a super-2 number, since 2×297288085681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (297288085981) 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, 2614276 + ... + 2725621.

It is an arithmetic number, because the mean of its divisors is an integer number (74323370313).

Almost surely, 2^297288085681 is an apocalyptic number.

It is an amenable number.

297288085681 is a deficient number, since it is larger than the sum of its proper divisors (5395571).

297288085681 is an equidigital number, since it uses as much as digits as its factorization.

297288085681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5395570.

The product of its (nonzero) digits is 30965760, while the sum is 64.

The spelling of 297288085681 in words is "two hundred ninety-seven billion, two hundred eighty-eight million, eighty-five thousand, six hundred eighty-one".