3943812049 has 4 divisors (see below), whose sum is σ = 3963630400. Its totient is φ = 3923993700.

The previous prime is 3943812023. The next prime is 3943812053. The reversal of 3943812049 is 9402183493.

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 an emirpimes, since its reverse is a distinct semiprime: 9402183493 = 2677 ⋅3512209.

It is a cyclic number.

It is not a de Polignac number, because 3943812049 - 2¹¹ = 3943810001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3943811996 and 3943812014.

It is not an unprimeable number, because it can be changed into a prime (3943812449) 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, 9908877 + ... + 9909274.

It is an arithmetic number, because the mean of its divisors is an integer number (990907600).

Almost surely, 2^3943812049 is an apocalyptic number.

It is an amenable number.

3943812049 is a deficient number, since it is larger than the sum of its proper divisors (19818351).

3943812049 is a wasteful number, since it uses less digits than its factorization.

3943812049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19818350.

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

The square root of 3943812049 is about 62799.7774597968. Note that the first 3 decimals coincide. The cubic root of 3943812049 is about 1579.9332409169.

The spelling of 3943812049 in words is "three billion, nine hundred forty-three million, eight hundred twelve thousand, forty-nine".