671898223 has 2 divisors, whose sum is σ = 671898224. Its totient is φ = 671898222.

The previous prime is 671898221. The next prime is 671898233. The reversal of 671898223 is 322898176.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 671898223 - 2¹ = 671898221 is a prime.

Together with 671898221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671898221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335949111 + 335949112.

It is an arithmetic number, because the mean of its divisors is an integer number (335949112).

Almost surely, 2^671898223 is an apocalyptic number.

671898223 is a deficient number, since it is larger than the sum of its proper divisors (1).

671898223 is an equidigital number, since it uses as much as digits as its factorization.

671898223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 46.

The square root of 671898223 is about 25920.9996527912. Note that the first 3 decimals coincide. The cubic root of 671898223 is about 875.8596060704.

The spelling of 671898223 in words is "six hundred seventy-one million, eight hundred ninety-eight thousand, two hundred twenty-three".