3961584989 has 2 divisors, whose sum is σ = 3961584990. Its totient is φ = 3961584988.

The previous prime is 3961584983. The next prime is 3961585007. The reversal of 3961584989 is 9894851693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2403940900 + 1557644089 = 49030^2 + 39467^2 .

It is an emirp because it is prime and its reverse (9894851693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3961584989 - 2¹⁶ = 3961519453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3961584983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1980792494 + 1980792495.

It is an arithmetic number, because the mean of its divisors is an integer number (1980792495).

Almost surely, 2^3961584989 is an apocalyptic number.

It is an amenable number.

3961584989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3961584989 is an equidigital number, since it uses as much as digits as its factorization.

3961584989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160, while the sum is 62.

The square root of 3961584989 is about 62941.1231946174. The cubic root of 3961584989 is about 1582.3030278431.

The spelling of 3961584989 in words is "three billion, nine hundred sixty-one million, five hundred eighty-four thousand, nine hundred eighty-nine".