171239020697 has 4 divisors (see below), whose sum is σ = 174141377040. Its totient is φ = 168336664356.

The previous prime is 171239020651. The next prime is 171239020723. The reversal of 171239020697 is 796020932171.

171239020697 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 796020932171 = 499 ⋅1595232329.

It is a cyclic number.

It is not a de Polignac number, because 171239020697 - 2¹⁶ = 171238955161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171239020097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1451178083 + ... + 1451178200.

It is an arithmetic number, because the mean of its divisors is an integer number (43535344260).

Almost surely, 2^171239020697 is an apocalyptic number.

It is an amenable number.

171239020697 is a deficient number, since it is larger than the sum of its proper divisors (2902356343).

171239020697 is an equidigital number, since it uses as much as digits as its factorization.

171239020697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902356342.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 171239020697 in words is "one hundred seventy-one billion, two hundred thirty-nine million, twenty thousand, six hundred ninety-seven".