338494181 has 2 divisors, whose sum is σ = 338494182. Its totient is φ = 338494180.

The previous prime is 338494147. The next prime is 338494183. The reversal of 338494181 is 181494833.

338494181 = 13009² + 13010².

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 169260100 + 169234081 = 13010^2 + 13009^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338494181 is a prime.

It is a super-2 number, since 2×338494181² = 229156621141721522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 338494183, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338494183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169247090 + 169247091.

It is an arithmetic number, because the mean of its divisors is an integer number (169247091).

Almost surely, 2^338494181 is an apocalyptic number.

338494181 is the 13010-th centered square number.

It is an amenable number.

338494181 is a deficient number, since it is larger than the sum of its proper divisors (1).

338494181 is an equidigital number, since it uses as much as digits as its factorization.

338494181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 41.

The square root of 338494181 is about 18398.2113532811. The cubic root of 338494181 is about 696.9212962627.

The spelling of 338494181 in words is "three hundred thirty-eight million, four hundred ninety-four thousand, one hundred eighty-one".