3964621489 has 2 divisors, whose sum is σ = 3964621490. Its totient is φ = 3964621488.

The previous prime is 3964621439. The next prime is 3964621499. The reversal of 3964621489 is 9841264693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2443621489 + 1521000000 = 49433^2 + 39000^2 .

It is a cyclic number.

It is not a de Polignac number, because 3964621489 - 2²¹ = 3962524337 is a prime.

It is not a weakly prime, because it can be changed into another prime (3964621439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982310744 + 1982310745.

It is an arithmetic number, because the mean of its divisors is an integer number (1982310745).

Almost surely, 2^3964621489 is an apocalyptic number.

It is an amenable number.

3964621489 is a deficient number, since it is larger than the sum of its proper divisors (1).

3964621489 is an equidigital number, since it uses as much as digits as its factorization.

3964621489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2239488, while the sum is 52.

The square root of 3964621489 is about 62965.2403235309. The cubic root of 3964621489 is about 1582.7071957128.

The spelling of 3964621489 in words is "three billion, nine hundred sixty-four million, six hundred twenty-one thousand, four hundred eighty-nine".