381234533 has 2 divisors, whose sum is σ = 381234534. Its totient is φ = 381234532.

The previous prime is 381234509. The next prime is 381234583. The reversal of 381234533 is 335432183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 355812769 + 25421764 = 18863^2 + 5042^2 .

It is a cyclic number.

It is not a de Polignac number, because 381234533 - 2¹⁰ = 381233509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381234533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381234583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190617266 + 190617267.

It is an arithmetic number, because the mean of its divisors is an integer number (190617267).

Almost surely, 2^381234533 is an apocalyptic number.

It is an amenable number.

381234533 is a deficient number, since it is larger than the sum of its proper divisors (1).

381234533 is an equidigital number, since it uses as much as digits as its factorization.

381234533 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 32.

The square root of 381234533 is about 19525.2281164651. The cubic root of 381234533 is about 725.0991750179.

The spelling of 381234533 in words is "three hundred eighty-one million, two hundred thirty-four thousand, five hundred thirty-three".