1973542699589 has 2 divisors, whose sum is σ = 1973542699590. Its totient is φ = 1973542699588.

The previous prime is 1973542699559. The next prime is 1973542699603. The reversal of 1973542699589 is 9859962453791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1923921573025 + 49621126564 = 1387055^2 + 222758^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1973542699589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973542699559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986771349794 + 986771349795.

It is an arithmetic number, because the mean of its divisors is an integer number (986771349795).

Almost surely, 2^{1973542699589} is an apocalyptic number.

It is an amenable number.

1973542699589 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973542699589 is an equidigital number, since it uses as much as digits as its factorization.

1973542699589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1322697600, while the sum is 77.

The spelling of 1973542699589 in words is "one trillion, nine hundred seventy-three billion, five hundred forty-two million, six hundred ninety-nine thousand, five hundred eighty-nine".