171261379 has 2 divisors, whose sum is σ = 171261380. Its totient is φ = 171261378.

The previous prime is 171261353. The next prime is 171261401. The reversal of 171261379 is 973162171.

It is a strong prime.

It is an emirp because it is prime and its reverse (973162171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171261379 - 2¹⁵ = 171228611 is a prime.

It is not a weakly prime, because it can be changed into another prime (171261479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85630689 + 85630690.

It is an arithmetic number, because the mean of its divisors is an integer number (85630690).

Almost surely, 2^171261379 is an apocalyptic number.

171261379 is a deficient number, since it is larger than the sum of its proper divisors (1).

171261379 is an equidigital number, since it uses as much as digits as its factorization.

171261379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 37.

The square root of 171261379 is about 13086.6870903220. The cubic root of 171261379 is about 555.3325702019.

The spelling of 171261379 in words is "one hundred seventy-one million, two hundred sixty-one thousand, three hundred seventy-nine".