381366955 has 16 divisors (see below), whose sum is σ = 494750880. Its totient is φ = 281221632.

The previous prime is 381366943. The next prime is 381366971. The reversal of 381366955 is 559663183.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381366955 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50734 + ... + 57763.

It is an arithmetic number, because the mean of its divisors is an integer number (30921930).

Almost surely, 2^381366955 is an apocalyptic number.

381366955 is a deficient number, since it is larger than the sum of its proper divisors (113383925).

381366955 is a wasteful number, since it uses less digits than its factorization.

381366955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108558.

The product of its digits is 583200, while the sum is 46.

The square root of 381366955 is about 19528.6188707753. The cubic root of 381366955 is about 725.1831198160.

The spelling of 381366955 in words is "three hundred eighty-one million, three hundred sixty-six thousand, nine hundred fifty-five".