3781933381 has 16 divisors (see below), whose sum is σ = 3969957888. Its totient is φ = 3598560000.

The previous prime is 3781933369. The next prime is 3781933403. The reversal of 3781933381 is 1833391873.

It is a cyclic number.

It is not a de Polignac number, because 3781933381 - 2¹⁵ = 3781900613 is a prime.

It is a super-2 number, since 2×3781933381² = 28606040196644182322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3781933321) by changing a digit.

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, 440631 + ... + 449131.

It is an arithmetic number, because the mean of its divisors is an integer number (248122368).

Almost surely, 2^3781933381 is an apocalyptic number.

3781933381 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3781933381 is a deficient number, since it is larger than the sum of its proper divisors (188024507).

3781933381 is a wasteful number, since it uses less digits than its factorization.

3781933381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8772.

The product of its digits is 326592, while the sum is 46.

The square root of 3781933381 is about 61497.4258079149. The cubic root of 3781933381 is about 1558.0137691358.

The spelling of 3781933381 in words is "three billion, seven hundred eighty-one million, nine hundred thirty-three thousand, three hundred eighty-one".