3974985709 has 2 divisors, whose sum is σ = 3974985710. Its totient is φ = 3974985708.

The previous prime is 3974985689. The next prime is 3974985719. The reversal of 3974985709 is 9075894793.

3974985709 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., 3419676484 + 555309225 = 58478^2 + 23565^2 .

It is a cyclic number.

It is not a de Polignac number, because 3974985709 - 2¹⁵ = 3974952941 is a prime.

It is a super-2 number, since 2×3974985709² = 31601022773508465362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3974985719) 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, 1987492854 + 1987492855.

It is an arithmetic number, because the mean of its divisors is an integer number (1987492855).

Almost surely, 2^3974985709 is an apocalyptic number.

It is an amenable number.

3974985709 is a deficient number, since it is larger than the sum of its proper divisors (1).

3974985709 is an equidigital number, since it uses as much as digits as its factorization.

3974985709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17146080, while the sum is 61.

The square root of 3974985709 is about 63047.4877294885. The cubic root of 3974985709 is about 1584.0851542760.

The spelling of 3974985709 in words is "three billion, nine hundred seventy-four million, nine hundred eighty-five thousand, seven hundred nine".