297981985 has 24 divisors (see below), whose sum is σ = 421681896. Its totient is φ = 201519360.

The previous prime is 297981977. The next prime is 297982039. The reversal of 297981985 is 589189792.

It can be written as a sum of positive squares in 4 ways, for example, as 35153041 + 262828944 = 5929^2 + 16212^2 .

It is not a de Polignac number, because 297981985 - 2³ = 297981977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9555 + ... + 26215.

It is an arithmetic number, because the mean of its divisors is an integer number (17570079).

Almost surely, 2^297981985 is an apocalyptic number.

It is an amenable number.

297981985 is a deficient number, since it is larger than the sum of its proper divisors (123699911).

297981985 is a wasteful number, since it uses less digits than its factorization.

297981985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16753 (or 16746 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 58.

The square root of 297981985 is about 17262.1547032808. The cubic root of 297981985 is about 667.9285431889.

The spelling of 297981985 in words is "two hundred ninety-seven million, nine hundred eighty-one thousand, nine hundred eighty-five".