978078401 has 2 divisors, whose sum is σ = 978078402. Its totient is φ = 978078400.

The previous prime is 978078349. The next prime is 978078469. The reversal of 978078401 is 104870879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 834054400 + 144024001 = 28880^2 + 12001^2 .

It is a cyclic number.

It is not a de Polignac number, because 978078401 - 2⁶ = 978078337 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (978078481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 489039200 + 489039201.

It is an arithmetic number, because the mean of its divisors is an integer number (489039201).

Almost surely, 2^978078401 is an apocalyptic number.

It is an amenable number.

978078401 is a deficient number, since it is larger than the sum of its proper divisors (1).

978078401 is an equidigital number, since it uses as much as digits as its factorization.

978078401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 44.

The square root of 978078401 is about 31274.2450108712. The cubic root of 978078401 is about 992.6387452255.

The spelling of 978078401 in words is "nine hundred seventy-eight million, seventy-eight thousand, four hundred one".