617668223 has 2 divisors, whose sum is σ = 617668224. Its totient is φ = 617668222.

The previous prime is 617668133. The next prime is 617668279. The reversal of 617668223 is 322866716.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 617668223 - 2¹⁸ = 617406079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (617668523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308834111 + 308834112.

It is an arithmetic number, because the mean of its divisors is an integer number (308834112).

Almost surely, 2^617668223 is an apocalyptic number.

617668223 is a deficient number, since it is larger than the sum of its proper divisors (1).

617668223 is an equidigital number, since it uses as much as digits as its factorization.

617668223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 41.

The square root of 617668223 is about 24852.9318793578. The cubic root of 617668223 is about 851.6315711623.

The spelling of 617668223 in words is "six hundred seventeen million, six hundred sixty-eight thousand, two hundred twenty-three".