170641969 has 3 divisors (see below), whose sum is σ = 170655033. Its totient is φ = 170628906.

The previous prime is 170641957. The next prime is 170641973. The reversal of 170641969 is 969146071.

It is a happy number.

The square root of 170641969 is 13063.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 969146071 = 487 ⋅1990033.

It is not a de Polignac number, because 170641969 - 2²³ = 162253361 is a prime.

It is a super-2 number, since 2×170641969² = 58237363168393922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (170641979) 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 in 2 ways as a sum of consecutive naturals, for example, 6532 + ... + 19594.

It is an arithmetic number, because the mean of its divisors is an integer number (56885011).

Almost surely, 2^170641969 is an apocalyptic number.

170641969 is the 13063-rd square number.

170641969 is the 6532-nd centered octagonal number.

It is an amenable number.

170641969 is a deficient number, since it is larger than the sum of its proper divisors (13064).

170641969 is an frugal number, since it uses more digits than its factorization.

170641969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26126 (or 13063 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 43.

The cubic root of 170641969 is about 554.6622613059.

The spelling of 170641969 in words is "one hundred seventy million, six hundred forty-one thousand, nine hundred sixty-nine".