68408219 has 4 divisors (see below), whose sum is σ = 74627160. Its totient is φ = 62189280.

The previous prime is 68408191. The next prime is 68408239. The reversal of 68408219 is 91280486.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68408219 is a prime.

It is a super-2 number, since 2×68408219² = 9359368853503922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68408239) 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, 3109454 + ... + 3109475.

It is an arithmetic number, because the mean of its divisors is an integer number (18656790).

Almost surely, 2^68408219 is an apocalyptic number.

68408219 is a deficient number, since it is larger than the sum of its proper divisors (6218941).

68408219 is a wasteful number, since it uses less digits than its factorization.

68408219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6218940.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 68408219 is about 8270.9261271033. The cubic root of 68408219 is about 408.9806504038.

The spelling of 68408219 in words is "sixty-eight million, four hundred eight thousand, two hundred nineteen".