978775403 has 2 divisors, whose sum is σ = 978775404. Its totient is φ = 978775402.

The previous prime is 978775381. The next prime is 978775409. The reversal of 978775403 is 304577879.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 978775403 - 2⁶ = 978775339 is a prime.

It is not a weakly prime, because it can be changed into another prime (978775409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489387701 + 489387702.

It is an arithmetic number, because the mean of its divisors is an integer number (489387702).

Almost surely, 2^978775403 is an apocalyptic number.

978775403 is a deficient number, since it is larger than the sum of its proper divisors (1).

978775403 is an equidigital number, since it uses as much as digits as its factorization.

978775403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1481760, while the sum is 50.

The square root of 978775403 is about 31285.3864128286. The cubic root of 978775403 is about 992.8744819201.

The spelling of 978775403 in words is "nine hundred seventy-eight million, seven hundred seventy-five thousand, four hundred three".