3985441897 has 2 divisors, whose sum is σ = 3985441898. Its totient is φ = 3985441896.

The previous prime is 3985441877. The next prime is 3985441913. The reversal of 3985441897 is 7981445893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2235776656 + 1749665241 = 47284^2 + 41829^2 .

It is an emirp because it is prime and its reverse (7981445893) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3985441897 - 2¹¹ = 3985439849 is a prime.

It is a super-2 number, since 2×3985441897² = 31767494228725917218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3985441847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1992720948 + 1992720949.

It is an arithmetic number, because the mean of its divisors is an integer number (1992720949).

Almost surely, 2^3985441897 is an apocalyptic number.

It is an amenable number.

3985441897 is a deficient number, since it is larger than the sum of its proper divisors (1).

3985441897 is an equidigital number, since it uses as much as digits as its factorization.

3985441897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8709120, while the sum is 58.

The square root of 3985441897 is about 63130.3563826469. The cubic root of 3985441897 is about 1585.4729152370.

The spelling of 3985441897 in words is "three billion, nine hundred eighty-five million, four hundred forty-one thousand, eight hundred ninety-seven".