135717173 has 2 divisors, whose sum is σ = 135717174. Its totient is φ = 135717172.

The previous prime is 135717161. The next prime is 135717191. The reversal of 135717173 is 371717531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88698724 + 47018449 = 9418^2 + 6857^2 .

It is an emirp because it is prime and its reverse (371717531) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135717173 is a prime.

It is a super-2 number, since 2×135717173² = 36838302094223858, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135717193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67858586 + 67858587.

It is an arithmetic number, because the mean of its divisors is an integer number (67858587).

Almost surely, 2^135717173 is an apocalyptic number.

It is an amenable number.

135717173 is a deficient number, since it is larger than the sum of its proper divisors (1).

135717173 is an equidigital number, since it uses as much as digits as its factorization.

135717173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15435, while the sum is 35.

The square root of 135717173 is about 11649.7713711472. The cubic root of 135717173 is about 513.8995864853.

The spelling of 135717173 in words is "one hundred thirty-five million, seven hundred seventeen thousand, one hundred seventy-three".