181356097 has 6 divisors (see below), whose sum is σ = 196379862. Its totient is φ = 167405472.

The previous prime is 181356067. The next prime is 181356103. The reversal of 181356097 is 790653181.

It can be written as a sum of positive squares in 3 ways, for example, as 26204161 + 155151936 = 5119^2 + 12456^2 .

It is a de Polignac number, because none of the positive numbers 2^k-181356097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181356047) 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 5 ways as a sum of consecutive naturals, for example, 536388 + ... + 536725.

It is an arithmetic number, because the mean of its divisors is an integer number (32729977).

Almost surely, 2^181356097 is an apocalyptic number.

It is an amenable number.

181356097 is a deficient number, since it is larger than the sum of its proper divisors (15023765).

181356097 is a wasteful number, since it uses less digits than its factorization.

181356097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073139 (or 1073126 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 181356097 is about 13466.8517850313. The cubic root of 181356097 is about 566.0360003655.

The spelling of 181356097 in words is "one hundred eighty-one million, three hundred fifty-six thousand, ninety-seven".