3909445931 has 2 divisors, whose sum is σ = 3909445932. Its totient is φ = 3909445930.

The previous prime is 3909445927. The next prime is 3909445963. The reversal of 3909445931 is 1395449093.

It is a happy number.

3909445931 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3909445931 - 2² = 3909445927 is a prime.

It is a super-4 number, since 4×3909445931⁴ (a number of 39 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (3909445901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1954722965 + 1954722966.

It is an arithmetic number, because the mean of its divisors is an integer number (1954722966).

Almost surely, 2^3909445931 is an apocalyptic number.

3909445931 is a deficient number, since it is larger than the sum of its proper divisors (1).

3909445931 is an equidigital number, since it uses as much as digits as its factorization.

3909445931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 524880, while the sum is 47.

The square root of 3909445931 is about 62525.5622205830. The cubic root of 3909445931 is about 1575.3307014995.

The spelling of 3909445931 in words is "three billion, nine hundred nine million, four hundred forty-five thousand, nine hundred thirty-one".