670218223 has 2 divisors, whose sum is σ = 670218224. Its totient is φ = 670218222.

The previous prime is 670218191. The next prime is 670218239. The reversal of 670218223 is 322812076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670218223 - 2⁵ = 670218191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670218023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335109111 + 335109112.

It is an arithmetic number, because the mean of its divisors is an integer number (335109112).

Almost surely, 2^670218223 is an apocalyptic number.

670218223 is a deficient number, since it is larger than the sum of its proper divisors (1).

670218223 is an equidigital number, since it uses as much as digits as its factorization.

670218223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 670218223 is about 25888.5732129061. The cubic root of 670218223 is about 875.1290032383.

The spelling of 670218223 in words is "six hundred seventy million, two hundred eighteen thousand, two hundred twenty-three".