297981 has 12 divisors (see below), whose sum is σ = 435708. Its totient is φ = 196224.

The previous prime is 297971. The next prime is 297989. The reversal of 297981 is 189792.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 133956 + 164025 = 366^2 + 405^2 .

It is not a de Polignac number, because 297981 - 2⁷ = 297853 is a prime.

It is a super-2 number, since 2×297981² = 177585352722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 297981.

It is not an unprimeable number, because it can be changed into a prime (297989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 871 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (36309).

2²⁹⁷⁹⁸¹ is an apocalyptic number.

It is an amenable number.

297981 is a deficient number, since it is larger than the sum of its proper divisors (137727).

297981 is a wasteful number, since it uses less digits than its factorization.

297981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 409 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 297981 is about 545.8763596273. The cubic root of 297981 is about 66.7927807227.

The spelling of 297981 in words is "two hundred ninety-seven thousand, nine hundred eighty-one".