3964023991 has 2 divisors, whose sum is σ = 3964023992. Its totient is φ = 3964023990.

The previous prime is 3964023983. The next prime is 3964024013. The reversal of 3964023991 is 1993204693.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3964023991 - 2³ = 3964023983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3964023391) 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 as a sum of consecutive naturals, namely, 1982011995 + 1982011996.

It is an arithmetic number, because the mean of its divisors is an integer number (1982011996).

Almost surely, 2^3964023991 is an apocalyptic number.

3964023991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3964023991 is an equidigital number, since it uses as much as digits as its factorization.

3964023991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 3964023991 is about 62960.4954793083. The cubic root of 3964023991 is about 1582.6276831291.

The spelling of 3964023991 in words is "three billion, nine hundred sixty-four million, twenty-three thousand, nine hundred ninety-one".