171938488289 has 2 divisors, whose sum is σ = 171938488290. Its totient is φ = 171938488288.

The previous prime is 171938488277. The next prime is 171938488301. The reversal of 171938488289 is 982884839171.

It is a balanced prime because it is at equal distance from previous prime (171938488277) and next prime (171938488301).

It can be written as a sum of positive squares in only one way, i.e., 144046816225 + 27891672064 = 379535^2 + 167008^2 .

It is a cyclic number.

It is not a de Polignac number, because 171938488289 - 2⁴ = 171938488273 is a prime.

It is not a weakly prime, because it can be changed into another prime (171938488789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85969244144 + 85969244145.

It is an arithmetic number, because the mean of its divisors is an integer number (85969244145).

Almost surely, 2^171938488289 is an apocalyptic number.

It is an amenable number.

171938488289 is a deficient number, since it is larger than the sum of its proper divisors (1).

171938488289 is an equidigital number, since it uses as much as digits as its factorization.

171938488289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 55738368, while the sum is 68.

The spelling of 171938488289 in words is "one hundred seventy-one billion, nine hundred thirty-eight million, four hundred eighty-eight thousand, two hundred eighty-nine".