978288427 has 2 divisors, whose sum is σ = 978288428. Its totient is φ = 978288426.

The previous prime is 978288419. The next prime is 978288433. The reversal of 978288427 is 724882879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978288427 - 2³ = 978288419 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (978288457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489144213 + 489144214.

It is an arithmetic number, because the mean of its divisors is an integer number (489144214).

Almost surely, 2^978288427 is an apocalyptic number.

978288427 is a deficient number, since it is larger than the sum of its proper divisors (1).

978288427 is an equidigital number, since it uses as much as digits as its factorization.

978288427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3612672, while the sum is 55.

The square root of 978288427 is about 31277.6026415069. The cubic root of 978288427 is about 992.7097910041.

The spelling of 978288427 in words is "nine hundred seventy-eight million, two hundred eighty-eight thousand, four hundred twenty-seven".