3109643381 has 4 divisors (see below), whose sum is σ = 3348846732. Its totient is φ = 2870440032.

The previous prime is 3109643359. The next prime is 3109643393. The reversal of 3109643381 is 1833469013.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1573708900 + 1535934481 = 39670^2 + 39191^2 .

It is a cyclic number.

It is not a de Polignac number, because 3109643381 - 2¹⁰ = 3109642357 is a prime.

It is a super-2 number, since 2×3109643381² = 19339763913994222322, 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 (3109642381) 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, 119601656 + ... + 119601681.

It is an arithmetic number, because the mean of its divisors is an integer number (837211683).

Almost surely, 2^3109643381 is an apocalyptic number.

It is an amenable number.

3109643381 is a deficient number, since it is larger than the sum of its proper divisors (239203351).

3109643381 is a wasteful number, since it uses less digits than its factorization.

3109643381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239203350.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 3109643381 is about 55764.1765024823. The cubic root of 3109643381 is about 1459.6101074667.

The spelling of 3109643381 in words is "three billion, one hundred nine million, six hundred forty-three thousand, three hundred eighty-one".