3971354266547 has 2 divisors, whose sum is σ = 3971354266548. Its totient is φ = 3971354266546.

The previous prime is 3971354266541. The next prime is 3971354266591. The reversal of 3971354266547 is 7456624531793.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (7456624531793) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3971354266547 - 2¹⁰ = 3971354265523 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3971354266547.

It is not a weakly prime, because it can be changed into another prime (3971354266541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985677133273 + 1985677133274.

It is an arithmetic number, because the mean of its divisors is an integer number (1985677133274).

Almost surely, 2^{3971354266547} is an apocalyptic number.

3971354266547 is a deficient number, since it is larger than the sum of its proper divisors (1).

3971354266547 is an equidigital number, since it uses as much as digits as its factorization.

3971354266547 is an evil number, because the sum of its binary digits is even.

The product of its digits is 114307200, while the sum is 62.

The spelling of 3971354266547 in words is "three trillion, nine hundred seventy-one billion, three hundred fifty-four million, two hundred sixty-six thousand, five hundred forty-seven".