381961071 has 12 divisors (see below), whose sum is σ = 557410672. Its totient is φ = 252014976.

The previous prime is 381961067. The next prime is 381961087. The reversal of 381961071 is 170169183.

381961071 is a `hidden beast` number, since 38 + 1 + 9 + 610 + 7 + 1 = 666.

It is not a de Polignac number, because 381961071 - 2² = 381961067 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 (381961271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 217891 + ... + 219636.

Almost surely, 2^381961071 is an apocalyptic number.

381961071 is a deficient number, since it is larger than the sum of its proper divisors (175449601).

381961071 is a wasteful number, since it uses less digits than its factorization.

381961071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437630 (or 437627 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 381961071 is about 19543.8243698617. The cubic root of 381961071 is about 725.5595021527.

The spelling of 381961071 in words is "three hundred eighty-one million, nine hundred sixty-one thousand, seventy-one".