978776473 has 2 divisors, whose sum is σ = 978776474. Its totient is φ = 978776472.

The previous prime is 978776459. The next prime is 978776489. The reversal of 978776473 is 374677879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 950612224 + 28164249 = 30832^2 + 5307^2 .

It is a cyclic number.

It is not a de Polignac number, because 978776473 - 2⁹ = 978775961 is a prime.

It is not a weakly prime, because it can be changed into another prime (978776273) 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, 489388236 + 489388237.

It is an arithmetic number, because the mean of its divisors is an integer number (489388237).

Almost surely, 2^978776473 is an apocalyptic number.

It is an amenable number.

978776473 is a deficient number, since it is larger than the sum of its proper divisors (1).

978776473 is an equidigital number, since it uses as much as digits as its factorization.

978776473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12446784, while the sum is 58.

The square root of 978776473 is about 31285.4035134598. The cubic root of 978776473 is about 992.8748437243.

The spelling of 978776473 in words is "nine hundred seventy-eight million, seven hundred seventy-six thousand, four hundred seventy-three".