168309219 has 16 divisors (see below), whose sum is σ = 241920000. Its totient is φ = 103469856.

The previous prime is 168309203. The next prime is 168309257. The reversal of 168309219 is 912903861.

It is not a de Polignac number, because 168309219 - 2⁴ = 168309203 is a prime.

It is a super-2 number, since 2×168309219² = 56655986400779922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (168302219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57022 + ... + 59900.

It is an arithmetic number, because the mean of its divisors is an integer number (15120000).

Almost surely, 2^168309219 is an apocalyptic number.

168309219 is a deficient number, since it is larger than the sum of its proper divisors (73610781).

168309219 is a wasteful number, since it uses less digits than its factorization.

168309219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4394.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 168309219 is about 12973.4042949412. The cubic root of 168309219 is about 552.1231642048.

The spelling of 168309219 in words is "one hundred sixty-eight million, three hundred nine thousand, two hundred nineteen".