181161797 has 8 divisors (see below), whose sum is σ = 182710080. Its totient is φ = 179618400.

The previous prime is 181161787. The next prime is 181161853. The reversal of 181161797 is 797161181.

181161797 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 181161797 - 2⁶ = 181161733 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 (181161727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121418 + ... + 122900.

It is an arithmetic number, because the mean of its divisors is an integer number (22838760).

Almost surely, 2^181161797 is an apocalyptic number.

It is an amenable number.

181161797 is a deficient number, since it is larger than the sum of its proper divisors (1548283).

181161797 is a wasteful number, since it uses less digits than its factorization.

181161797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2443.

The product of its digits is 21168, while the sum is 41.

The square root of 181161797 is about 13459.6358420278. The cubic root of 181161797 is about 565.8337829290.

The spelling of 181161797 in words is "one hundred eighty-one million, one hundred sixty-one thousand, seven hundred ninety-seven".