135544973 has 2 divisors, whose sum is σ = 135544974. Its totient is φ = 135544972.

The previous prime is 135544939. The next prime is 135544979. The reversal of 135544973 is 379445531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129458884 + 6086089 = 11378^2 + 2467^2 .

It is a cyclic number.

It is not a de Polignac number, because 135544973 - 2⁶ = 135544909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135544973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135544979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67772486 + 67772487.

It is an arithmetic number, because the mean of its divisors is an integer number (67772487).

Almost surely, 2^135544973 is an apocalyptic number.

It is an amenable number.

135544973 is a deficient number, since it is larger than the sum of its proper divisors (1).

135544973 is an equidigital number, since it uses as much as digits as its factorization.

135544973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 41.

The square root of 135544973 is about 11642.3783223189. The cubic root of 135544973 is about 513.6821466420.

The spelling of 135544973 in words is "one hundred thirty-five million, five hundred forty-four thousand, nine hundred seventy-three".