160997321 has 2 divisors, whose sum is σ = 160997322. Its totient is φ = 160997320.

The previous prime is 160997311. The next prime is 160997359. The reversal of 160997321 is 123799061.

It is a happy number.

It is an a-pointer prime, because the next prime (160997359) can be obtained adding 160997321 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159037321 + 1960000 = 12611^2 + 1400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-160997321 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (160997311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80498660 + 80498661.

It is an arithmetic number, because the mean of its divisors is an integer number (80498661).

Almost surely, 2^160997321 is an apocalyptic number.

It is an amenable number.

160997321 is a deficient number, since it is larger than the sum of its proper divisors (1).

160997321 is an equidigital number, since it uses as much as digits as its factorization.

160997321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 160997321 is about 12688.4719726214. The cubic root of 160997321 is about 544.0091651156.

The spelling of 160997321 in words is "one hundred sixty million, nine hundred ninety-seven thousand, three hundred twenty-one".