978231223 has 2 divisors, whose sum is σ = 978231224. Its totient is φ = 978231222.

The previous prime is 978231203. The next prime is 978231253. The reversal of 978231223 is 322132879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978231223 - 2¹³ = 978223031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (978231203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489115611 + 489115612.

It is an arithmetic number, because the mean of its divisors is an integer number (489115612).

Almost surely, 2^978231223 is an apocalyptic number.

978231223 is a deficient number, since it is larger than the sum of its proper divisors (1).

978231223 is an equidigital number, since it uses as much as digits as its factorization.

978231223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 978231223 is about 31276.6881718637. The cubic root of 978231223 is about 992.6904415375.

The spelling of 978231223 in words is "nine hundred seventy-eight million, two hundred thirty-one thousand, two hundred twenty-three".