171705379 has 2 divisors, whose sum is σ = 171705380. Its totient is φ = 171705378.

The previous prime is 171705349. The next prime is 171705427. The reversal of 171705379 is 973507171.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 171705379 - 2¹⁹ = 171181091 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (171705349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85852689 + 85852690.

It is an arithmetic number, because the mean of its divisors is an integer number (85852690).

Almost surely, 2^171705379 is an apocalyptic number.

171705379 is a deficient number, since it is larger than the sum of its proper divisors (1).

171705379 is an equidigital number, since it uses as much as digits as its factorization.

171705379 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46305, while the sum is 40.

The square root of 171705379 is about 13103.6399141613. The cubic root of 171705379 is about 555.8120612408.

The spelling of 171705379 in words is "one hundred seventy-one million, seven hundred five thousand, three hundred seventy-nine".