168963217 has 4 divisors (see below), whose sum is σ = 169376740. Its totient is φ = 168549696.

The previous prime is 168963191. The next prime is 168963227. The reversal of 168963217 is 712369861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 151019521 + 17943696 = 12289^2 + 4236^2 .

It is a cyclic number.

It is not a de Polignac number, because 168963217 - 2⁷ = 168963089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168963227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206148 + ... + 206965.

It is an arithmetic number, because the mean of its divisors is an integer number (42344185).

Almost surely, 2^168963217 is an apocalyptic number.

It is an amenable number.

168963217 is a deficient number, since it is larger than the sum of its proper divisors (413523).

168963217 is an equidigital number, since it uses as much as digits as its factorization.

168963217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413522.

The product of its digits is 108864, while the sum is 43.

The square root of 168963217 is about 12998.5851922430. The cubic root of 168963217 is about 552.8373670326.

The spelling of 168963217 in words is "one hundred sixty-eight million, nine hundred sixty-three thousand, two hundred seventeen".