3971354266613 has 2 divisors, whose sum is σ = 3971354266614. Its totient is φ = 3971354266612.

The previous prime is 3971354266591. The next prime is 3971354266643. The reversal of 3971354266613 is 3166624531793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3785055852484 + 186298414129 = 1945522^2 + 431623^2 .

It is a cyclic number.

It is not a de Polignac number, because 3971354266613 - 2²⁴ = 3971337489397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3971354266643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985677133306 + 1985677133307.

It is an arithmetic number, because the mean of its divisors is an integer number (1985677133307).

Almost surely, 2^{3971354266613} is an apocalyptic number.

It is an amenable number.

3971354266613 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971354266613 is an equidigital number, since it uses as much as digits as its factorization.

3971354266613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14696640, while the sum is 56.

The spelling of 3971354266613 in words is "three trillion, nine hundred seventy-one billion, three hundred fifty-four million, two hundred sixty-six thousand, six hundred thirteen".