3989858321 has 2 divisors, whose sum is σ = 3989858322. Its totient is φ = 3989858320.

The previous prime is 3989858287. The next prime is 3989858339. The reversal of 3989858321 is 1238589893.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3649972225 + 339886096 = 60415^2 + 18436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3989858321 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3989858381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1994929160 + 1994929161.

It is an arithmetic number, because the mean of its divisors is an integer number (1994929161).

Almost surely, 2^3989858321 is an apocalyptic number.

It is an amenable number.

3989858321 is a deficient number, since it is larger than the sum of its proper divisors (1).

3989858321 is an equidigital number, since it uses as much as digits as its factorization.

3989858321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 56.

The square root of 3989858321 is about 63165.3253058986. The cubic root of 3989858321 is about 1586.0583405562.

The spelling of 3989858321 in words is "three billion, nine hundred eighty-nine million, eight hundred fifty-eight thousand, three hundred twenty-one".