381945941 has 4 divisors (see below), whose sum is σ = 411326412. Its totient is φ = 352565472.

The previous prime is 381945929. The next prime is 381945959. The reversal of 381945941 is 149549183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 149549183 = 7 ⋅21364169.

It can be written as a sum of positive squares in 2 ways, for example, as 236236900 + 145709041 = 15370^2 + 12071^2 .

It is a cyclic number.

It is not a de Polignac number, because 381945941 - 2¹⁴ = 381929557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 381945892 and 381945901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381945901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14690216 + ... + 14690241.

It is an arithmetic number, because the mean of its divisors is an integer number (102831603).

Almost surely, 2^381945941 is an apocalyptic number.

It is an amenable number.

381945941 is a deficient number, since it is larger than the sum of its proper divisors (29380471).

381945941 is a wasteful number, since it uses less digits than its factorization.

381945941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29380470.

The product of its digits is 155520, while the sum is 44.

The square root of 381945941 is about 19543.4372872328. The cubic root of 381945941 is about 725.5499218918.

The spelling of 381945941 in words is "three hundred eighty-one million, nine hundred forty-five thousand, nine hundred forty-one".