3989987741 has 2 divisors, whose sum is σ = 3989987742. Its totient is φ = 3989987740.

The previous prime is 3989987719. The next prime is 3989987753. The reversal of 3989987741 is 1477899893.

3989987741 is digitally balanced in base 3, 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., 3934425625 + 55562116 = 62725^2 + 7454^2 .

It is an emirp because it is prime and its reverse (1477899893) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3989987741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3989987761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994993870 + 1994993871.

It is an arithmetic number, because the mean of its divisors is an integer number (1994993871).

Almost surely, 2^3989987741 is an apocalyptic number.

It is an amenable number.

3989987741 is a deficient number, since it is larger than the sum of its proper divisors (1).

3989987741 is an equidigital number, since it uses as much as digits as its factorization.

3989987741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27433728, while the sum is 65.

The square root of 3989987741 is about 63166.3497520634. The cubic root of 3989987741 is about 1586.0754894902.

The spelling of 3989987741 in words is "three billion, nine hundred eighty-nine million, nine hundred eighty-seven thousand, seven hundred forty-one".