160981 has 2 divisors, whose sum is σ = 160982. Its totient is φ = 160980.

The previous prime is 160969. The next prime is 160997. The reversal of 160981 is 189061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152881 + 8100 = 391^2 + 90^2 .

It is an emirp because it is prime and its reverse (189061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 160981 - 2¹⁵ = 128213 is a prime.

It is a super-2 number, since 2×160981² = 51829764722, which contains 22 as substring.

160981 is a lucky number.

It is equal to p₁₄₇₆₇ and since 160981 and 14767 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80490 + 80491.

It is an arithmetic number, because the mean of its divisors is an integer number (80491).

2¹⁶⁰⁹⁸¹ is an apocalyptic number.

It is an amenable number.

160981 is a deficient number, since it is larger than the sum of its proper divisors (1).

160981 is an equidigital number, since it uses as much as digits as its factorization.

160981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 160981 is about 401.2243761289. The cubic root of 160981 is about 54.3990781634.

The spelling of 160981 in words is "one hundred sixty thousand, nine hundred eighty-one".