160493581 has 4 divisors (see below), whose sum is σ = 162148252. Its totient is φ = 158838912.

The previous prime is 160493573. The next prime is 160493621. The reversal of 160493581 is 185394061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 185394061 = 17 ⋅10905533.

It can be written as a sum of positive squares in 2 ways, for example, as 110565225 + 49928356 = 10515^2 + 7066^2 .

It is a cyclic number.

It is not a de Polignac number, because 160493581 - 2³ = 160493573 is a prime.

It is a super-2 number, since 2×160493581² = 51516379084407122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 160493581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (160493681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827190 + ... + 827383.

It is an arithmetic number, because the mean of its divisors is an integer number (40537063).

Almost surely, 2^160493581 is an apocalyptic number.

It is an amenable number.

160493581 is a deficient number, since it is larger than the sum of its proper divisors (1654671).

160493581 is an equidigital number, since it uses as much as digits as its factorization.

160493581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654670.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 160493581 is about 12668.6061190646. The cubic root of 160493581 is about 543.4411939962.

The spelling of 160493581 in words is "one hundred sixty million, four hundred ninety-three thousand, five hundred eighty-one".