297980161 has 2 divisors, whose sum is σ = 297980162. Its totient is φ = 297980160.

The previous prime is 297980143. The next prime is 297980171. The reversal of 297980161 is 161089792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 200760561 + 97219600 = 14169^2 + 9860^2 .

It is a cyclic number.

It is not a de Polignac number, because 297980161 - 2²⁵ = 264425729 is a prime.

It is not a weakly prime, because it can be changed into another prime (297980171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 148990080 + 148990081.

It is an arithmetic number, because the mean of its divisors is an integer number (148990081).

Almost surely, 2^297980161 is an apocalyptic number.

It is an amenable number.

297980161 is a deficient number, since it is larger than the sum of its proper divisors (1).

297980161 is an equidigital number, since it uses as much as digits as its factorization.

297980161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 297980161 is about 17262.1018708615. The cubic root of 297980161 is about 667.9271803502.

The spelling of 297980161 in words is "two hundred ninety-seven million, nine hundred eighty thousand, one hundred sixty-one".