67421219 has 2 divisors, whose sum is σ = 67421220. Its totient is φ = 67421218.

The previous prime is 67421213. The next prime is 67421227. The reversal of 67421219 is 91212476.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67421219 - 2¹² = 67417123 is a prime.

It is a super-2 number, since 2×67421219² = 9091241542891922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (67421213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33710609 + 33710610.

It is an arithmetic number, because the mean of its divisors is an integer number (33710610).

Almost surely, 2^67421219 is an apocalyptic number.

67421219 is a deficient number, since it is larger than the sum of its proper divisors (1).

67421219 is an equidigital number, since it uses as much as digits as its factorization.

67421219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 67421219 is about 8211.0425038481. The cubic root of 67421219 is about 407.0041774650.

The spelling of 67421219 in words is "sixty-seven million, four hundred twenty-one thousand, two hundred nineteen".