381979311 has 16 divisors (see below), whose sum is σ = 587718144. Its totient is φ = 216153504.

The previous prime is 381979309. The next prime is 381979327. The reversal of 381979311 is 113979183.

It is not a de Polignac number, because 381979311 - 2¹ = 381979309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381979391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86136 + ... + 90461.

It is an arithmetic number, because the mean of its divisors is an integer number (36732384).

Almost surely, 2^381979311 is an apocalyptic number.

381979311 is a deficient number, since it is larger than the sum of its proper divisors (205738833).

381979311 is a wasteful number, since it uses less digits than its factorization.

381979311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176710.

The product of its digits is 40824, while the sum is 42.

The square root of 381979311 is about 19544.2910078621. The cubic root of 381979311 is about 725.5710513180.

The spelling of 381979311 in words is "three hundred eighty-one million, nine hundred seventy-nine thousand, three hundred eleven".