671543219 has 2 divisors, whose sum is σ = 671543220. Its totient is φ = 671543218.

The previous prime is 671543183. The next prime is 671543237. The reversal of 671543219 is 912345176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671543219 - 2¹⁶ = 671477683 is a prime.

It is a super-2 number, since 2×671543219² = 901940589969763922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671543819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335771609 + 335771610.

It is an arithmetic number, because the mean of its divisors is an integer number (335771610).

Almost surely, 2^671543219 is an apocalyptic number.

671543219 is a deficient number, since it is larger than the sum of its proper divisors (1).

671543219 is an equidigital number, since it uses as much as digits as its factorization.

671543219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 671543219 is about 25914.1509411364. The cubic root of 671543219 is about 875.7053225641.

The spelling of 671543219 in words is "six hundred seventy-one million, five hundred forty-three thousand, two hundred nineteen".