381795961 has 4 divisors (see below), whose sum is σ = 384358500. Its totient is φ = 379233424.

The previous prime is 381795959. The next prime is 381795989. The reversal of 381795961 is 169597183.

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 91298025 + 290497936 = 9555^2 + 17044^2 .

It is a cyclic number.

It is not a de Polignac number, because 381795961 - 2¹ = 381795959 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381295961) 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 in 3 ways as a sum of consecutive naturals, for example, 1281046 + ... + 1281343.

It is an arithmetic number, because the mean of its divisors is an integer number (96089625).

Almost surely, 2^381795961 is an apocalyptic number.

It is an amenable number.

381795961 is a deficient number, since it is larger than the sum of its proper divisors (2562539).

381795961 is a wasteful number, since it uses less digits than its factorization.

381795961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2562538.

The product of its digits is 408240, while the sum is 49.

The square root of 381795961 is about 19539.5998167823. The cubic root of 381795961 is about 725.4549414141.

The spelling of 381795961 in words is "three hundred eighty-one million, seven hundred ninety-five thousand, nine hundred sixty-one".