3143938381 has 4 divisors (see below), whose sum is σ = 3144064032. Its totient is φ = 3143812732.

The previous prime is 3143938363. The next prime is 3143938387. The reversal of 3143938381 is 1838393413.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 3143938381 - 2⁹ = 3143937869 is a prime.

It is a super-2 number, since 2×3143938381² = 19768697087049802322, 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 (3143938387) 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 3 ways as a sum of consecutive naturals, for example, 11095 + ... + 80068.

It is an arithmetic number, because the mean of its divisors is an integer number (786016008).

Almost surely, 2^3143938381 is an apocalyptic number.

It is an amenable number.

3143938381 is a deficient number, since it is larger than the sum of its proper divisors (125651).

3143938381 is an equidigital number, since it uses as much as digits as its factorization.

3143938381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125650.

The product of its digits is 186624, while the sum is 43.

The square root of 3143938381 is about 56070.8336035768. The cubic root of 3143938381 is about 1464.9563182819.

The spelling of 3143938381 in words is "three billion, one hundred forty-three million, nine hundred thirty-eight thousand, three hundred eighty-one".