381753387 has 6 divisors (see below), whose sum is σ = 551421572. Its totient is φ = 254502252.

The previous prime is 381753373. The next prime is 381753389. The reversal of 381753387 is 783357183.

381753387 is a `hidden beast` number, since 38 + 1 + 7 + 533 + 87 = 666.

It is not a de Polignac number, because 381753387 - 2⁴ = 381753371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381753389) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21208513 + ... + 21208530.

Almost surely, 2^381753387 is an apocalyptic number.

381753387 is a deficient number, since it is larger than the sum of its proper divisors (169668185).

381753387 is a wasteful number, since it uses less digits than its factorization.

381753387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42417049 (or 42417046 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 381753387 is about 19538.5103577525. The cubic root of 381753387 is about 725.4279752944.

The spelling of 381753387 in words is "three hundred eighty-one million, seven hundred fifty-three thousand, three hundred eighty-seven".