3813812109 has 6 divisors (see below), whose sum is σ = 5508839726. Its totient is φ = 2542541400.

The previous prime is 3813812089. The next prime is 3813812141. The reversal of 3813812109 is 9012183183.

3813812109 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 3600360009 + 213452100 = 60003^2 + 14610^2 .

It is not a de Polignac number, because 3813812109 - 2⁸ = 3813811853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3813812909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 211878442 + ... + 211878459.

Almost surely, 2^3813812109 is an apocalyptic number.

It is an amenable number.

3813812109 is a deficient number, since it is larger than the sum of its proper divisors (1695027617).

3813812109 is a wasteful number, since it uses less digits than its factorization.

3813812109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423756907 (or 423756904 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 3813812109 is about 61756.0694102207. The cubic root of 3813812109 is about 1562.3791372667.

The spelling of 3813812109 in words is "three billion, eight hundred thirteen million, eight hundred twelve thousand, one hundred nine".