3991013717 has 2 divisors, whose sum is σ = 3991013718. Its totient is φ = 3991013716.

The previous prime is 3991013699. The next prime is 3991013729. The reversal of 3991013717 is 7173101993.

3991013717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3258012241 + 733001476 = 57079^2 + 27074^2 .

It is a cyclic number.

It is not a de Polignac number, because 3991013717 - 2¹⁸ = 3990751573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3991013777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995506858 + 1995506859.

It is an arithmetic number, because the mean of its divisors is an integer number (1995506859).

Almost surely, 2^3991013717 is an apocalyptic number.

It is an amenable number.

3991013717 is a deficient number, since it is larger than the sum of its proper divisors (1).

3991013717 is an equidigital number, since it uses as much as digits as its factorization.

3991013717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35721, while the sum is 41.

The square root of 3991013717 is about 63174.4704528657. The cubic root of 3991013717 is about 1586.2114244048.

The spelling of 3991013717 in words is "three billion, nine hundred ninety-one million, thirteen thousand, seven hundred seventeen".