381673813 has 8 divisors (see below), whose sum is σ = 386725248. Its totient is φ = 376648464.

The previous prime is 381673801. The next prime is 381673819. The reversal of 381673813 is 318376183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381673813 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 (381673819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23856 + ... + 36502.

It is an arithmetic number, because the mean of its divisors is an integer number (48340656).

Almost surely, 2^381673813 is an apocalyptic number.

It is an amenable number.

381673813 is a deficient number, since it is larger than the sum of its proper divisors (5051435).

381673813 is a wasteful number, since it uses less digits than its factorization.

381673813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13043.

The product of its digits is 72576, while the sum is 40.

The square root of 381673813 is about 19536.4739141944. The cubic root of 381673813 is about 725.3775682175.

The spelling of 381673813 in words is "three hundred eighty-one million, six hundred seventy-three thousand, eight hundred thirteen".