381717946 has 4 divisors (see below), whose sum is σ = 572576922. Its totient is φ = 190858972.

The previous prime is 381717929. The next prime is 381717953. The reversal of 381717946 is 649717183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 649717183 = 22109 ⋅29387.

It can be written as a sum of positive squares in only one way, i.e., 272745225 + 108972721 = 16515^2 + 10439^2 .

It is a junction number, because it is equal to n+sod(n) for n = 381717896 and 381717905.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95429485 + ... + 95429488.

Almost surely, 2^381717946 is an apocalyptic number.

381717946 is a deficient number, since it is larger than the sum of its proper divisors (190858976).

381717946 is a wasteful number, since it uses less digits than its factorization.

381717946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190858975.

The product of its digits is 254016, while the sum is 46.

The square root of 381717946 is about 19537.6033842434. The cubic root of 381717946 is about 725.4055256455.

The spelling of 381717946 in words is "three hundred eighty-one million, seven hundred seventeen thousand, nine hundred forty-six".