171426649 has 3 divisors (see below), whose sum is σ = 171439743. Its totient is φ = 171413556.

The previous prime is 171426643. The next prime is 171426667. The reversal of 171426649 is 946624171.

The square root of 171426649 is 13093.

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.

It can be written as a sum of positive squares in only one way, i.e., 154878025 + 16548624 = 12445^2 + 4068^2 .

It is a de Polignac number, because none of the positive numbers 2^k-171426649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171426643) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6547 + ... + 19639.

It is an arithmetic number, because the mean of its divisors is an integer number (57146581).

Almost surely, 2^171426649 is an apocalyptic number.

171426649 is the 13093-rd square number.

171426649 is the 6547-th centered octagonal number.

It is an amenable number.

171426649 is a deficient number, since it is larger than the sum of its proper divisors (13094).

171426649 is an frugal number, since it uses more digits than its factorization.

171426649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26186 (or 13093 counting only the distinct ones).

The product of its digits is 72576, while the sum is 40.

The cubic root of 171426649 is about 555.5111477408.

The spelling of 171426649 in words is "one hundred seventy-one million, four hundred twenty-six thousand, six hundred forty-nine".