172061717 has 2 divisors, whose sum is σ = 172061718. Its totient is φ = 172061716.

The previous prime is 172061699. The next prime is 172061719. The reversal of 172061717 is 717160271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 137499076 + 34562641 = 11726^2 + 5879^2 .

It is a cyclic number.

It is not a de Polignac number, because 172061717 - 2¹² = 172057621 is a prime.

Together with 172061719, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172061719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86030858 + 86030859.

It is an arithmetic number, because the mean of its divisors is an integer number (86030859).

Almost surely, 2^172061717 is an apocalyptic number.

It is an amenable number.

172061717 is a deficient number, since it is larger than the sum of its proper divisors (1).

172061717 is an equidigital number, since it uses as much as digits as its factorization.

172061717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4116, while the sum is 32.

The square root of 172061717 is about 13117.2297761379. The cubic root of 172061717 is about 556.1962854836.

The spelling of 172061717 in words is "one hundred seventy-two million, sixty-one thousand, seven hundred seventeen".