171980383 has 2 divisors, whose sum is σ = 171980384. Its totient is φ = 171980382.

The previous prime is 171980371. The next prime is 171980387. The reversal of 171980383 is 383089171.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 171980383 - 2¹³ = 171972191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171980387) 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, 85990191 + 85990192.

It is an arithmetic number, because the mean of its divisors is an integer number (85990192).

Almost surely, 2^171980383 is an apocalyptic number.

171980383 is a deficient number, since it is larger than the sum of its proper divisors (1).

171980383 is an equidigital number, since it uses as much as digits as its factorization.

171980383 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 171980383 is about 13114.1291361646. The cubic root of 171980383 is about 556.1086332168.

The spelling of 171980383 in words is "one hundred seventy-one million, nine hundred eighty thousand, three hundred eighty-three".