978223 has 2 divisors, whose sum is σ = 978224. Its totient is φ = 978222.

The previous prime is 978217. The next prime is 978233. The reversal of 978223 is 322879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978223 - 2¹³ = 970031 is a prime.

978223 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489111 + 489112.

It is an arithmetic number, because the mean of its divisors is an integer number (489112).

2⁹⁷⁸²²³ is an apocalyptic number.

978223 is a deficient number, since it is larger than the sum of its proper divisors (1).

978223 is an equidigital number, since it uses as much as digits as its factorization.

978223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 31.

The square root of 978223 is about 989.0515658953. The cubic root of 978223 is about 99.2687660015.

The spelling of 978223 in words is "nine hundred seventy-eight thousand, two hundred twenty-three".