3971551799 has 2 divisors, whose sum is σ = 3971551800. Its totient is φ = 3971551798.

The previous prime is 3971551693. The next prime is 3971551807. The reversal of 3971551799 is 9971551793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3971551799 - 2¹² = 3971547703 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3971551099) 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, 1985775899 + 1985775900.

It is an arithmetic number, because the mean of its divisors is an integer number (1985775900).

Almost surely, 2^3971551799 is an apocalyptic number.

3971551799 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971551799 is an equidigital number, since it uses as much as digits as its factorization.

3971551799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2679075, while the sum is 56.

The square root of 3971551799 is about 63020.2491188348. The cubic root of 3971551799 is about 1583.6288697850.

The spelling of 3971551799 in words is "three billion, nine hundred seventy-one million, five hundred fifty-one thousand, seven hundred ninety-nine".