181934397 has 16 divisors (see below), whose sum is σ = 269784960. Its totient is φ = 121176000.

The previous prime is 181934383. The next prime is 181934399. The reversal of 181934397 is 793439181.

181934397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 181934397 - 2¹⁰ = 181933373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181934399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34272 + ... + 39222.

It is an arithmetic number, because the mean of its divisors is an integer number (16861560).

Almost surely, 2^181934397 is an apocalyptic number.

It is an amenable number.

181934397 is a deficient number, since it is larger than the sum of its proper divisors (87850563).

181934397 is a wasteful number, since it uses less digits than its factorization.

181934397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321 (or 6315 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 181934397 is about 13488.3059351425. The cubic root of 181934397 is about 566.6370118660.

The spelling of 181934397 in words is "one hundred eighty-one million, nine hundred thirty-four thousand, three hundred ninety-seven".