3991469941 has 2 divisors, whose sum is σ = 3991469942. Its totient is φ = 3991469940.

The previous prime is 3991469927. The next prime is 3991470031. The reversal of 3991469941 is 1499641993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3300042916 + 691427025 = 57446^2 + 26295^2 .

It is a cyclic number.

It is not a de Polignac number, because 3991469941 - 2⁷ = 3991469813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3991469921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995734970 + 1995734971.

It is an arithmetic number, because the mean of its divisors is an integer number (1995734971).

Almost surely, 2^3991469941 is an apocalyptic number.

It is an amenable number.

3991469941 is a deficient number, since it is larger than the sum of its proper divisors (1).

3991469941 is an equidigital number, since it uses as much as digits as its factorization.

3991469941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 55.

The square root of 3991469941 is about 63178.0811753570. The cubic root of 3991469941 is about 1586.2718635313.

The spelling of 3991469941 in words is "three billion, nine hundred ninety-one million, four hundred sixty-nine thousand, nine hundred forty-one".