135804173 has 2 divisors, whose sum is σ = 135804174. Its totient is φ = 135804172.

The previous prime is 135804139. The next prime is 135804181. The reversal of 135804173 is 371408531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99960004 + 35844169 = 9998^2 + 5987^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135804173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135804133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67902086 + 67902087.

It is an arithmetic number, because the mean of its divisors is an integer number (67902087).

Almost surely, 2^135804173 is an apocalyptic number.

It is an amenable number.

135804173 is a deficient number, since it is larger than the sum of its proper divisors (1).

135804173 is an equidigital number, since it uses as much as digits as its factorization.

135804173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 135804173 is about 11653.5047517903. The cubic root of 135804173 is about 514.0093729208.

The spelling of 135804173 in words is "one hundred thirty-five million, eight hundred four thousand, one hundred seventy-three".