137985447794693 has 2 divisors, whose sum is σ = 137985447794694. Its totient is φ = 137985447794692.

The previous prime is 137985447794633. The next prime is 137985447794707. The reversal of 137985447794693 is 396497744589731.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134869735635649 + 3115712159044 = 11613343^2 + 1765138^2 .

It is a cyclic number.

It is not a de Polignac number, because 137985447794693 - 2²⁰ = 137985446746117 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (137985447794633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68992723897346 + 68992723897347.

It is an arithmetic number, because the mean of its divisors is an integer number (68992723897347).

Almost surely, 2^{137985447794693} is an apocalyptic number.

It is an amenable number.

137985447794693 is a deficient number, since it is larger than the sum of its proper divisors (1).

137985447794693 is an equidigital number, since it uses as much as digits as its factorization.

137985447794693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34566497280, while the sum is 86.

The spelling of 137985447794693 in words is "one hundred thirty-seven trillion, nine hundred eighty-five billion, four hundred forty-seven million, seven hundred ninety-four thousand, six hundred ninety-three".