3973175981 has 2 divisors, whose sum is σ = 3973175982. Its totient is φ = 3973175980.

The previous prime is 3973175959. The next prime is 3973176017. The reversal of 3973175981 is 1895713793.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3835324900 + 137851081 = 61930^2 + 11741^2 .

It is an emirp because it is prime and its reverse (1895713793) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3973175981 is a prime.

It is a super-3 number, since 3×3973175981³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3973175081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986587990 + 1986587991.

It is an arithmetic number, because the mean of its divisors is an integer number (1986587991).

Almost surely, 2^3973175981 is an apocalyptic number.

It is an amenable number.

3973175981 is a deficient number, since it is larger than the sum of its proper divisors (1).

3973175981 is an equidigital number, since it uses as much as digits as its factorization.

3973175981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 53.

The square root of 3973175981 is about 63033.1339931627. The cubic root of 3973175981 is about 1583.8447174848.

The spelling of 3973175981 in words is "three billion, nine hundred seventy-three million, one hundred seventy-five thousand, nine hundred eighty-one".