171960649 has 8 divisors (see below), whose sum is σ = 200537600. Its totient is φ = 147394548.

The previous prime is 171960631. The next prime is 171960707. The reversal of 171960649 is 946069171.

It is a happy number.

It is not a de Polignac number, because 171960649 - 2¹³ = 171952457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171960149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250329 + ... + 251014.

It is an arithmetic number, because the mean of its divisors is an integer number (25067200).

Almost surely, 2^171960649 is an apocalyptic number.

It is an amenable number.

171960649 is a deficient number, since it is larger than the sum of its proper divisors (28576951).

171960649 is an frugal number, since it uses more digits than its factorization.

171960649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501364 (or 501350 counting only the distinct ones).

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

The square root of 171960649 is about 13113.3767199757. The cubic root of 171960649 is about 556.0873620553.

The spelling of 171960649 in words is "one hundred seventy-one million, nine hundred sixty thousand, six hundred forty-nine".