171045397 has 2 divisors, whose sum is σ = 171045398. Its totient is φ = 171045396.

The previous prime is 171045389. The next prime is 171045473. The reversal of 171045397 is 793540171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127035441 + 44009956 = 11271^2 + 6634^2 .

It is an emirp because it is prime and its reverse (793540171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171045397 - 2³ = 171045389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171045097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85522698 + 85522699.

It is an arithmetic number, because the mean of its divisors is an integer number (85522699).

Almost surely, 2^171045397 is an apocalyptic number.

It is an amenable number.

171045397 is a deficient number, since it is larger than the sum of its proper divisors (1).

171045397 is an equidigital number, since it uses as much as digits as its factorization.

171045397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 171045397 is about 13078.4325131110. The cubic root of 171045397 is about 555.0990240753.

The spelling of 171045397 in words is "one hundred seventy-one million, forty-five thousand, three hundred ninety-seven".