3985933969 has 2 divisors, whose sum is σ = 3985933970. Its totient is φ = 3985933968.

The previous prime is 3985933957. The next prime is 3985934003. The reversal of 3985933969 is 9693395893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2592031744 + 1393902225 = 50912^2 + 37335^2 .

It is a cyclic number.

It is not a de Polignac number, because 3985933969 - 2⁵ = 3985933937 is a prime.

It is a super-2 number, since 2×3985933969² = 31775339210456185922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3985933969.

It is not a weakly prime, because it can be changed into another prime (3985913969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992966984 + 1992966985.

It is an arithmetic number, because the mean of its divisors is an integer number (1992966985).

Almost surely, 2^3985933969 is an apocalyptic number.

It is an amenable number.

3985933969 is a deficient number, since it is larger than the sum of its proper divisors (1).

3985933969 is an equidigital number, since it uses as much as digits as its factorization.

3985933969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42515280, while the sum is 64.

The square root of 3985933969 is about 63134.2535316606. The cubic root of 3985933969 is about 1585.5381639382.

The spelling of 3985933969 in words is "three billion, nine hundred eighty-five million, nine hundred thirty-three thousand, nine hundred sixty-nine".