171063391 has 2 divisors, whose sum is σ = 171063392. Its totient is φ = 171063390.

The previous prime is 171063379. The next prime is 171063407. The reversal of 171063391 is 193360171.

171063391 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 is an emirp because it is prime and its reverse (193360171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171063391 - 2⁵ = 171063359 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171063311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85531695 + 85531696.

It is an arithmetic number, because the mean of its divisors is an integer number (85531696).

Almost surely, 2^171063391 is an apocalyptic number.

171063391 is a deficient number, since it is larger than the sum of its proper divisors (1).

171063391 is an equidigital number, since it uses as much as digits as its factorization.

171063391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 171063391 is about 13079.1204214962. The cubic root of 171063391 is about 555.1184888915.

The spelling of 171063391 in words is "one hundred seventy-one million, sixty-three thousand, three hundred ninety-one".