171926989 has 8 divisors (see below), whose sum is σ = 187496960. Its totient is φ = 156692016.

The previous prime is 171926983. The next prime is 171927011. The reversal of 171926989 is 989629171.

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

It is not a de Polignac number, because 171926989 - 2¹³ = 171918797 is a prime.

It is a super-2 number, since 2×171926989² = 59117779093212242, 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 (171926983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82677 + ... + 84730.

It is an arithmetic number, because the mean of its divisors is an integer number (23437120).

Almost surely, 2^171926989 is an apocalyptic number.

It is an amenable number.

171926989 is a deficient number, since it is larger than the sum of its proper divisors (15569971).

171926989 is a wasteful number, since it uses less digits than its factorization.

171926989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167499.

The product of its digits is 489888, while the sum is 52.

The square root of 171926989 is about 13112.0932348729. The cubic root of 171926989 is about 556.0510763854.

The spelling of 171926989 in words is "one hundred seventy-one million, nine hundred twenty-six thousand, nine hundred eighty-nine".