381623353 has 2 divisors, whose sum is σ = 381623354. Its totient is φ = 381623352.

The previous prime is 381623351. The next prime is 381623369. The reversal of 381623353 is 353326183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381538089 + 85264 = 19533^2 + 292^2 .

It is a cyclic number.

It is not a de Polignac number, because 381623353 - 2¹ = 381623351 is a prime.

Together with 381623351, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (381623351) 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, 190811676 + 190811677.

It is an arithmetic number, because the mean of its divisors is an integer number (190811677).

Almost surely, 2^381623353 is an apocalyptic number.

It is an amenable number.

381623353 is a deficient number, since it is larger than the sum of its proper divisors (1).

381623353 is an equidigital number, since it uses as much as digits as its factorization.

381623353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 34.

The square root of 381623353 is about 19535.1824409193. The cubic root of 381623353 is about 725.3456001128.

The spelling of 381623353 in words is "three hundred eighty-one million, six hundred twenty-three thousand, three hundred fifty-three".