160681321 has 2 divisors, whose sum is σ = 160681322. Its totient is φ = 160681320.

The previous prime is 160681291. The next prime is 160681349. The reversal of 160681321 is 123186061.

It is an a-pointer prime, because the next prime (160681349) can be obtained adding 160681321 to its sum of digits (28).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130210921 + 30470400 = 11411^2 + 5520^2 .

It is a cyclic number.

It is not a de Polignac number, because 160681321 - 2¹¹ = 160679273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 160681321.

It is not a weakly prime, because it can be changed into another prime (160681421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80340660 + 80340661.

It is an arithmetic number, because the mean of its divisors is an integer number (80340661).

Almost surely, 2^160681321 is an apocalyptic number.

It is an amenable number.

160681321 is a deficient number, since it is larger than the sum of its proper divisors (1).

160681321 is an equidigital number, since it uses as much as digits as its factorization.

160681321 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 160681321 is about 12676.0136083865. The cubic root of 160681321 is about 543.6530111769.

The spelling of 160681321 in words is "one hundred sixty million, six hundred eighty-one thousand, three hundred twenty-one".