1971603141773 has 2 divisors, whose sum is σ = 1971603141774. Its totient is φ = 1971603141772.

The previous prime is 1971603141743. The next prime is 1971603141803. The reversal of 1971603141773 is 3771413061791.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1971603141743) and next prime (1971603141803).

It can be written as a sum of positive squares in only one way, i.e., 1709825605609 + 261777536164 = 1307603^2 + 511642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1971603141773 - 2¹² = 1971603137677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1971603141743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 985801570886 + 985801570887.

It is an arithmetic number, because the mean of its divisors is an integer number (985801570887).

Almost surely, 2^{1971603141773} is an apocalyptic number.

It is an amenable number.

1971603141773 is a deficient number, since it is larger than the sum of its proper divisors (1).

1971603141773 is an equidigital number, since it uses as much as digits as its factorization.

1971603141773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 666792, while the sum is 50.

The spelling of 1971603141773 in words is "one trillion, nine hundred seventy-one billion, six hundred three million, one hundred forty-one thousand, seven hundred seventy-three".