381189337 has 2 divisors, whose sum is σ = 381189338. Its totient is φ = 381189336.

The previous prime is 381189257. The next prime is 381189349. The reversal of 381189337 is 733981183.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 372451401 + 8737936 = 19299^2 + 2956^2 .

It is a cyclic number.

It is not a de Polignac number, because 381189337 - 2⁷ = 381189209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 381189293 and 381189302.

It is not a weakly prime, because it can be changed into another prime (381189377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190594668 + 190594669.

It is an arithmetic number, because the mean of its divisors is an integer number (190594669).

Almost surely, 2^381189337 is an apocalyptic number.

It is an amenable number.

381189337 is a deficient number, since it is larger than the sum of its proper divisors (1).

381189337 is an equidigital number, since it uses as much as digits as its factorization.

381189337 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 43.

The square root of 381189337 is about 19524.0707077187. The cubic root of 381189337 is about 725.0705199735.

The spelling of 381189337 in words is "three hundred eighty-one million, one hundred eighty-nine thousand, three hundred thirty-seven".