171255389 has 2 divisors, whose sum is σ = 171255390. Its totient is φ = 171255388.

The previous prime is 171255373. The next prime is 171255421. The reversal of 171255389 is 983552171.

171255389 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89208025 + 82047364 = 9445^2 + 9058^2 .

It is a cyclic number.

It is not a de Polignac number, because 171255389 - 2⁴ = 171255373 is a prime.

It is a Chen prime.

It is equal to p_9569426 and since 171255389 and 9569426 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171258389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85627694 + 85627695.

It is an arithmetic number, because the mean of its divisors is an integer number (85627695).

Almost surely, 2^171255389 is an apocalyptic number.

It is an amenable number.

171255389 is a deficient number, since it is larger than the sum of its proper divisors (1).

171255389 is an equidigital number, since it uses as much as digits as its factorization.

171255389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 41.

The square root of 171255389 is about 13086.4582297885. The cubic root of 171255389 is about 555.3260957302.

The spelling of 171255389 in words is "one hundred seventy-one million, two hundred fifty-five thousand, three hundred eighty-nine".