160319981 has 4 divisors (see below), whose sum is σ = 160414752. Its totient is φ = 160225212.

The previous prime is 160319921. The next prime is 160319983. The reversal of 160319981 is 189913061.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 160319981 - 2¹⁰ = 160318957 is a prime.

It is a super-2 number, since 2×160319981² = 51404992615680722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160319983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44801 + ... + 48246.

It is an arithmetic number, because the mean of its divisors is an integer number (40103688).

Almost surely, 2^160319981 is an apocalyptic number.

It is an amenable number.

160319981 is a deficient number, since it is larger than the sum of its proper divisors (94771).

160319981 is an equidigital number, since it uses as much as digits as its factorization.

160319981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94770.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 160319981 is about 12661.7526827845. The cubic root of 160319981 is about 543.2451831935.

The spelling of 160319981 in words is "one hundred sixty million, three hundred nineteen thousand, nine hundred eighty-one".