381318433 has 2 divisors, whose sum is σ = 381318434. Its totient is φ = 381318432.

The previous prime is 381318407. The next prime is 381318461. The reversal of 381318433 is 334813183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 235561104 + 145757329 = 15348^2 + 12073^2 .

It is a cyclic number.

It is not a de Polignac number, because 381318433 - 2⁵ = 381318401 is a prime.

It is not a weakly prime, because it can be changed into another prime (381318233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190659216 + 190659217.

It is an arithmetic number, because the mean of its divisors is an integer number (190659217).

Almost surely, 2^381318433 is an apocalyptic number.

It is an amenable number.

381318433 is a deficient number, since it is larger than the sum of its proper divisors (1).

381318433 is an equidigital number, since it uses as much as digits as its factorization.

381318433 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The square root of 381318433 is about 19527.3765006977. The cubic root of 381318433 is about 725.1523630630.

It can be divided in two parts, 38131 and 8433, that added together give a palindrome (46564).

The spelling of 381318433 in words is "three hundred eighty-one million, three hundred eighteen thousand, four hundred thirty-three".