172217669 has 8 divisors (see below), whose sum is σ = 186124512. Its totient is φ = 158405040.

The previous prime is 172217663. The next prime is 172217713. The reversal of 172217669 is 966712271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 172217669 - 2¹⁶ = 172152133 is a prime.

It is a super-2 number, since 2×172217669² = 59317851031587122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172217663) 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 7 ways as a sum of consecutive naturals, for example, 19727 + ... + 27084.

It is an arithmetic number, because the mean of its divisors is an integer number (23265564).

Almost surely, 2^172217669 is an apocalyptic number.

It is an amenable number.

172217669 is a deficient number, since it is larger than the sum of its proper divisors (13906843).

172217669 is a wasteful number, since it uses less digits than its factorization.

172217669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47107.

The product of its digits is 63504, while the sum is 41.

The square root of 172217669 is about 13123.1729775996. The cubic root of 172217669 is about 556.3642750701.

It can be divided in two parts, 1722 and 17669, that added together give a palindrome (19391).

The spelling of 172217669 in words is "one hundred seventy-two million, two hundred seventeen thousand, six hundred sixty-nine".