3909047945 has 16 divisors (see below), whose sum is σ = 5167972800. Its totient is φ = 2814792000.

The previous prime is 3909047941. The next prime is 3909047957. The reversal of 3909047945 is 5497409093.

It is not a de Polignac number, because 3909047945 - 2² = 3909047941 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3909047893 and 3909047902.

It is not an unprimeable number, because it can be changed into a prime (3909047941) 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 15 ways as a sum of consecutive naturals, for example, 346295 + ... + 357404.

It is an arithmetic number, because the mean of its divisors is an integer number (322998300).

Almost surely, 2^3909047945 is an apocalyptic number.

It is an amenable number.

3909047945 is a deficient number, since it is larger than the sum of its proper divisors (1258924855).

3909047945 is a wasteful number, since it uses less digits than its factorization.

3909047945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703816.

The product of its (nonzero) digits is 1224720, while the sum is 50.

The square root of 3909047945 is about 62522.3795532448. The cubic root of 3909047945 is about 1575.2772428720.

The spelling of 3909047945 in words is "three billion, nine hundred nine million, forty-seven thousand, nine hundred forty-five".