160423981 has 2 divisors, whose sum is σ = 160423982. Its totient is φ = 160423980.

The previous prime is 160423877. The next prime is 160424029. The reversal of 160423981 is 189324061.

160423981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110439081 + 49984900 = 10509^2 + 7070^2 .

It is an emirp because it is prime and its reverse (189324061) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-160423981 is a prime.

It is a super-2 number, since 2×160423981² = 51471707359776722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (160423381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80211990 + 80211991.

It is an arithmetic number, because the mean of its divisors is an integer number (80211991).

Almost surely, 2^160423981 is an apocalyptic number.

It is an amenable number.

160423981 is a deficient number, since it is larger than the sum of its proper divisors (1).

160423981 is an equidigital number, since it uses as much as digits as its factorization.

160423981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 160423981 is about 12665.8588733650. The cubic root of 160423981 is about 543.3626260026.

The spelling of 160423981 in words is "one hundred sixty million, four hundred twenty-three thousand, nine hundred eighty-one".