381946966 has 4 divisors (see below), whose sum is σ = 572920452. Its totient is φ = 190973482.

The previous prime is 381946963. The next prime is 381947003. The reversal of 381946966 is 669649183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 669649183 = 7 ⋅95664169.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381946963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95486740 + ... + 95486743.

It is an arithmetic number, because the mean of its divisors is an integer number (143230113).

Almost surely, 2^381946966 is an apocalyptic number.

381946966 is a deficient number, since it is larger than the sum of its proper divisors (190973486).

381946966 is a wasteful number, since it uses less digits than its factorization.

381946966 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190973485.

The product of its digits is 1679616, while the sum is 52.

The square root of 381946966 is about 19543.4635108519. The cubic root of 381946966 is about 725.5505709260.

The spelling of 381946966 in words is "three hundred eighty-one million, nine hundred forty-six thousand, nine hundred sixty-six".