181834897 has 4 divisors (see below), whose sum is σ = 184325860. Its totient is φ = 179343936.

The previous prime is 181834879. The next prime is 181834927. The reversal of 181834897 is 798438181.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 798438181 = 103 ⋅7751827.

It can be written as a sum of positive squares in 2 ways, for example, as 104939536 + 76895361 = 10244^2 + 8769^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-181834897 is a prime.

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 181834897.

It is not an unprimeable number, because it can be changed into a prime (181834817) 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, 1245372 + ... + 1245517.

It is an arithmetic number, because the mean of its divisors is an integer number (46081465).

Almost surely, 2^181834897 is an apocalyptic number.

It is an amenable number.

181834897 is a deficient number, since it is larger than the sum of its proper divisors (2490963).

181834897 is an equidigital number, since it uses as much as digits as its factorization.

181834897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490962.

The product of its digits is 387072, while the sum is 49.

The square root of 181834897 is about 13484.6170505506. The cubic root of 181834897 is about 566.5336950206.

The spelling of 181834897 in words is "one hundred eighty-one million, eight hundred thirty-four thousand, eight hundred ninety-seven".