3811845947 has 8 divisors (see below), whose sum is σ = 4691502816. Its totient is φ = 3015965952.

The previous prime is 3811845943. The next prime is 3811845953. The reversal of 3811845947 is 7495481183.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3811845947 - 2² = 3811845943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3811845895 and 3811845904.

It is not an unprimeable number, because it can be changed into a prime (3811845943) 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 7 ways as a sum of consecutive naturals, for example, 20944118 + ... + 20944299.

It is an arithmetic number, because the mean of its divisors is an integer number (586437852).

Almost surely, 2^3811845947 is an apocalyptic number.

3811845947 is a deficient number, since it is larger than the sum of its proper divisors (879656869).

3811845947 is a wasteful number, since it uses less digits than its factorization.

3811845947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41888437.

The product of its digits is 967680, while the sum is 50.

The square root of 3811845947 is about 61740.1485825877. The cubic root of 3811845947 is about 1562.1106029285.

The spelling of 3811845947 in words is "three billion, eight hundred eleven million, eight hundred forty-five thousand, nine hundred forty-seven".