978214427 has 2 divisors, whose sum is σ = 978214428. Its totient is φ = 978214426.

The previous prime is 978214417. The next prime is 978214451. The reversal of 978214427 is 724412879.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 978214427 - 2¹⁰ = 978213403 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (978214417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489107213 + 489107214.

It is an arithmetic number, because the mean of its divisors is an integer number (489107214).

Almost surely, 2^978214427 is an apocalyptic number.

978214427 is a deficient number, since it is larger than the sum of its proper divisors (1).

978214427 is an equidigital number, since it uses as much as digits as its factorization.

978214427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 978214427 is about 31276.4196640216. The cubic root of 978214427 is about 992.6847600845.

The spelling of 978214427 in words is "nine hundred seventy-eight million, two hundred fourteen thousand, four hundred twenty-seven".