3912981849 has 12 divisors (see below), whose sum is σ = 6459525696. Its totient is φ = 2235989592.

The previous prime is 3912981841. The next prime is 3912981871. The reversal of 3912981849 is 9481892193.

It is not a de Polignac number, because 3912981849 - 2³ = 3912981841 is a prime.

It is a super-2 number, since 2×3912981849² = 30622853901206917602, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3912981795 and 3912981804.

It is not an unprimeable number, because it can be changed into a prime (3912981841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31055349 + ... + 31055474.

It is an arithmetic number, because the mean of its divisors is an integer number (538293808).

Almost surely, 2^3912981849 is an apocalyptic number.

It is an amenable number.

3912981849 is a deficient number, since it is larger than the sum of its proper divisors (2546543847).

3912981849 is a wasteful number, since it uses less digits than its factorization.

3912981849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62110836 (or 62110833 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 54.

The square root of 3912981849 is about 62553.8316092628. The cubic root of 3912981849 is about 1575.8054969719.

The spelling of 3912981849 in words is "three billion, nine hundred twelve million, nine hundred eighty-one thousand, eight hundred forty-nine".