3989535961 has 2 divisors, whose sum is σ = 3989535962. Its totient is φ = 3989535960.

The previous prime is 3989535959. The next prime is 3989536009. The reversal of 3989535961 is 1695359893.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3988680336 + 855625 = 63156^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 3989535961 - 2¹ = 3989535959 is a prime.

It is a super-2 number, since 2×3989535961² = 31832794368224387042, which contains 22 as substring.

Together with 3989535959, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3989535896 and 3989535905.

It is not a weakly prime, because it can be changed into another prime (3989535161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994767980 + 1994767981.

It is an arithmetic number, because the mean of its divisors is an integer number (1994767981).

Almost surely, 2^3989535961 is an apocalyptic number.

It is an amenable number.

3989535961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3989535961 is an equidigital number, since it uses as much as digits as its factorization.

3989535961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7873200, while the sum is 58.

The square root of 3989535961 is about 63162.7735378997. The cubic root of 3989535961 is about 1586.0156242912.

It can be divided in two parts, 398 and 9535961, that added together give a palindrome (9536359).

The spelling of 3989535961 in words is "three billion, nine hundred eighty-nine million, five hundred thirty-five thousand, nine hundred sixty-one".