181441597 has 4 divisors (see below), whose sum is σ = 181468540. Its totient is φ = 181414656.

The previous prime is 181441571. The next prime is 181441613. The reversal of 181441597 is 795144181.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 795144181 = 13 ⋅61164937.

It can be written as a sum of positive squares in 2 ways, for example, as 48246916 + 133194681 = 6946^2 + 11541^2 .

It is a cyclic number.

It is not a de Polignac number, because 181441597 - 2¹¹ = 181439549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181441517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6493 + ... + 20125.

It is an arithmetic number, because the mean of its divisors is an integer number (45367135).

Almost surely, 2^181441597 is an apocalyptic number.

It is an amenable number.

181441597 is a deficient number, since it is larger than the sum of its proper divisors (26943).

181441597 is a wasteful number, since it uses less digits than its factorization.

181441597 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26942.

The product of its digits is 40320, while the sum is 40.

The square root of 181441597 is about 13470.0258722840. The cubic root of 181441597 is about 566.1249386025.

The spelling of 181441597 in words is "one hundred eighty-one million, four hundred forty-one thousand, five hundred ninety-seven".