381438763 has 4 divisors (see below), whose sum is σ = 381555288. Its totient is φ = 381322240.

The previous prime is 381438731. The next prime is 381438803. The reversal of 381438763 is 367834183.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 381438763 - 2⁵ = 381438731 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381438263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53206 + ... + 59947.

It is an arithmetic number, because the mean of its divisors is an integer number (95388822).

Almost surely, 2^381438763 is an apocalyptic number.

381438763 is a deficient number, since it is larger than the sum of its proper divisors (116525).

381438763 is a wasteful number, since it uses less digits than its factorization.

381438763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116524.

The product of its digits is 290304, while the sum is 43.

The square root of 381438763 is about 19530.4573167143. The cubic root of 381438763 is about 725.2286321332.

The spelling of 381438763 in words is "three hundred eighty-one million, four hundred thirty-eight thousand, seven hundred sixty-three".