381668427 has 24 divisors (see below), whose sum is σ = 630799104. Its totient is φ = 217839024.

The previous prime is 381668407. The next prime is 381668453. The reversal of 381668427 is 724866183.

It is not a de Polignac number, because 381668427 - 2⁶ = 381668363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381668407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58848 + ... + 65010.

It is an arithmetic number, because the mean of its divisors is an integer number (26283296).

Almost surely, 2^381668427 is an apocalyptic number.

381668427 is a deficient number, since it is larger than the sum of its proper divisors (249130677).

381668427 is a wasteful number, since it uses less digits than its factorization.

381668427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7159 (or 7156 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 381668427 is about 19536.3360689767. The cubic root of 381668427 is about 725.3741561400.

The spelling of 381668427 in words is "three hundred eighty-one million, six hundred sixty-eight thousand, four hundred twenty-seven".