398542223 has 2 divisors, whose sum is σ = 398542224. Its totient is φ = 398542222.

The previous prime is 398542171. The next prime is 398542253. The reversal of 398542223 is 322245893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398542223 - 2⁶ = 398542159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398542253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199271111 + 199271112.

It is an arithmetic number, because the mean of its divisors is an integer number (199271112).

Almost surely, 2^398542223 is an apocalyptic number.

398542223 is a deficient number, since it is larger than the sum of its proper divisors (1).

398542223 is an equidigital number, since it uses as much as digits as its factorization.

398542223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 38.

The square root of 398542223 is about 19963.5223094523. The cubic root of 398542223 is about 735.9101274310.

The spelling of 398542223 in words is "three hundred ninety-eight million, five hundred forty-two thousand, two hundred twenty-three".