381444493 has 4 divisors (see below), whose sum is σ = 382150108. Its totient is φ = 380738880.

The previous prime is 381444473. The next prime is 381444509. The reversal of 381444493 is 394444183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 213949129 + 167495364 = 14627^2 + 12942^2 .

It is a cyclic number.

It is not a de Polignac number, because 381444493 - 2¹⁷ = 381313421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381444473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351996 + ... + 353077.

It is an arithmetic number, because the mean of its divisors is an integer number (95537527).

Almost surely, 2^381444493 is an apocalyptic number.

It is an amenable number.

381444493 is a deficient number, since it is larger than the sum of its proper divisors (705615).

381444493 is an equidigital number, since it uses as much as digits as its factorization.

381444493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705614.

The product of its digits is 165888, while the sum is 40.

The square root of 381444493 is about 19530.6040101170. The cubic root of 381444493 is about 725.2322635936.

The spelling of 381444493 in words is "three hundred eighty-one million, four hundred forty-four thousand, four hundred ninety-three".