160864981 has 4 divisors (see below), whose sum is σ = 161930464. Its totient is φ = 159799500.

The previous prime is 160864969. The next prime is 160865027. The reversal of 160864981 is 189468061.

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, and also an emirpimes, since its reverse is a distinct semiprime: 189468061 = 5051 ⋅37511.

It is a cyclic number.

It is not a de Polignac number, because 160864981 - 2¹³ = 160856789 is a prime.

It is a super-2 number, since 2×160864981² = 51755084224260722, 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 (160864961) 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, 532515 + ... + 532816.

It is an arithmetic number, because the mean of its divisors is an integer number (40482616).

Almost surely, 2^160864981 is an apocalyptic number.

It is an amenable number.

160864981 is a deficient number, since it is larger than the sum of its proper divisors (1065483).

160864981 is a wasteful number, since it uses less digits than its factorization.

160864981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065482.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 160864981 is about 12683.2559305566. The cubic root of 160864981 is about 543.8600655158.

The spelling of 160864981 in words is "one hundred sixty million, eight hundred sixty-four thousand, nine hundred eighty-one".