137643573493 has 2 divisors, whose sum is σ = 137643573494. Its totient is φ = 137643573492.

The previous prime is 137643573467. The next prime is 137643573517. The reversal of 137643573493 is 394375346731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136605638404 + 1037935089 = 369602^2 + 32217^2 .

It is an emirp because it is prime and its reverse (394375346731) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 137643573493 - 2²¹ = 137641476341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137643571493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68821786746 + 68821786747.

It is an arithmetic number, because the mean of its divisors is an integer number (68821786747).

Almost surely, 2^137643573493 is an apocalyptic number.

It is an amenable number.

137643573493 is a deficient number, since it is larger than the sum of its proper divisors (1).

137643573493 is an equidigital number, since it uses as much as digits as its factorization.

137643573493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17146080, while the sum is 55.

The spelling of 137643573493 in words is "one hundred thirty-seven billion, six hundred forty-three million, five hundred seventy-three thousand, four hundred ninety-three".