171489469 has 2 divisors, whose sum is σ = 171489470. Its totient is φ = 171489468.

The previous prime is 171489463. The next prime is 171489481. The reversal of 171489469 is 964984171.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 166023225 + 5466244 = 12885^2 + 2338^2 .

It is an emirp because it is prime and its reverse (964984171) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 171489469 - 2⁹ = 171488957 is a prime.

It is a super-2 number, since 2×171489469² = 58817275955803922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (171489463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 85744734 + 85744735.

It is an arithmetic number, because the mean of its divisors is an integer number (85744735).

Almost surely, 2^171489469 is an apocalyptic number.

It is an amenable number.

171489469 is a deficient number, since it is larger than the sum of its proper divisors (1).

171489469 is an equidigital number, since it uses as much as digits as its factorization.

171489469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 49.

The square root of 171489469 is about 13095.3987720879. The cubic root of 171489469 is about 555.5789959013.

The spelling of 171489469 in words is "one hundred seventy-one million, four hundred eighty-nine thousand, four hundred sixty-nine".