3954388489609 has 2 divisors, whose sum is σ = 3954388489610. Its totient is φ = 3954388489608.

The previous prime is 3954388489549. The next prime is 3954388489619. The reversal of 3954388489609 is 9069848834593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3907232195584 + 47156294025 = 1976672^2 + 217155^2 .

It is a cyclic number.

It is not a de Polignac number, because 3954388489609 - 2⁷ = 3954388489481 is a prime.

It is not a weakly prime, because it can be changed into another prime (3954388489619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1977194244804 + 1977194244805.

It is an arithmetic number, because the mean of its divisors is an integer number (1977194244805).

Almost surely, 2^{3954388489609} is an apocalyptic number.

It is an amenable number.

3954388489609 is a deficient number, since it is larger than the sum of its proper divisors (1).

3954388489609 is an equidigital number, since it uses as much as digits as its factorization.

3954388489609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1612431360, while the sum is 76.

The spelling of 3954388489609 in words is "three trillion, nine hundred fifty-four billion, three hundred eighty-eight million, four hundred eighty-nine thousand, six hundred nine".