39968219 has 2 divisors, whose sum is σ = 39968220. Its totient is φ = 39968218.

The previous prime is 39968197. The next prime is 39968221. The reversal of 39968219 is 91286993.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39968219 is a prime.

It is a super-2 number, since 2×39968219² = 3194917060063922, which contains 22 as substring.

Together with 39968221, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (39968249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19984109 + 19984110.

It is an arithmetic number, because the mean of its divisors is an integer number (19984110).

Almost surely, 2^39968219 is an apocalyptic number.

39968219 is a deficient number, since it is larger than the sum of its proper divisors (1).

39968219 is an equidigital number, since it uses as much as digits as its factorization.

39968219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 47.

The square root of 39968219 is about 6322.0423124177. The cubic root of 39968219 is about 341.9045907609.

The spelling of 39968219 in words is "thirty-nine million, nine hundred sixty-eight thousand, two hundred nineteen".